There are 126 nature words that start with the letter I. From Ibex to Ivy. Nature words encompass a vast array of terms that describe the natural world, including flora, fauna, geological formations, weather phenomena, and ecosystems. These words are essential in both scientific and everyday language, allowing for effective communication about the various elements and processes that shape our environment. The richness of natural vocabulary reflects the diversity and complexity of nature itself, ranging from common terms that anyone can understand to specialized terminology used by scientists and environmentalists. Understanding and utilizing nature words can enhance appreciation for the interconnectedness of life on Earth and the importance of preserving our natural resources.

An interesting fun fact about nature words is that many of them have etymological roots in ancient languages, such as Greek and Latin. For instance, the word “ecosystem” is derived from the Greek word “oikos,” meaning “house,” and “system,” indicating an organized whole. This etymology highlights how human language has evolved to describe nature and its intricate relationships over millennia, reflecting humanity’s enduring curiosity and connection to the environment.

Here’s what each of the columns in the table means:

Field: This column represents the specific area of study or interest related to the nature word, indicating whether it pertains to ecology, biology, geology, or another branch of natural sciences.

Definition: This column provides a concise and clear explanation of the term, giving users a straightforward understanding of what the word means in the context of nature.

Description: This column offers additional context or elaboration about the term, which may include examples, usage, relevance in scientific research, or significance in ecological discussions, providing a more comprehensive understanding of the word’s application and importance.

Nature words That Start With I

Nature words field definition
Ibex Animal Goat-Antelope
Ice Age Geology A period of long-term reduction in the Earth’s temperature, resulting in extensive glaciation.
Ice Apron Glaciology A thick layer of ice accumulation
Ice Axe mountaineering A tool used by mountaineers to assist in climbing on snow and ice
Ice Blink Meteorology An optical phenomenon caused by the reflection of sunlight from ice or snow-covered surfaces.
Ice Block Glaciology A large chunk of ice
Ice Bomb meteorology A supercooled water droplet that freezes upon impact with a surface, forming a jagged piece of ice
Ice Bridge geography A natural ice formation that connects two landmasses, allowing passage across a body of water
Ice Buoy Oceanography A floating device used to measure ice
Ice Cap geography A dome-shaped mass of glacial ice covering a highland area
Ice Castle architecture A structure made entirely of ice, typically built as a seasonal attraction.
Ice Cave geology A natural cave formed within a glacier or in the ice of a polar region
Ice Core climatology A cylindrical sample of ice extracted from a glacier or ice sheet, used to study past climates
Ice Cream Cone Geyser geology a geyser that erupts in the shape of an ice cream cone
Ice Cream Plant Botany A plant that produces a cooling effect
Ice Crystal Meteorology A solid, crystalline form of water
Ice Crystal Cloud Meteorology A type of high-altitude cloud composed of ice crystals rather than water droplets.
Ice Crystals Geological Solid Water
Ice Dam hydrology A blockage of ice that forms in a river or stream, causing water to back up and potentially flood the surrounding area.
Ice Drift geography The movement of ice floes or icebergs in open water, driven by wind and ocean currents
Ice Dune Geology A dune-like formation created by the movement and accumulation of ice.
Ice Fan Glaciology A fan-shaped glacial formation
Ice Field geography An extensive area of interconnected glaciers and snowfields
Ice Fishing recreation The activity of catching fish through a hole in the ice of a frozen body of water
Ice Flake Nature Tiny, delicate crystals of frozen water that form in the atmosphere and fall to the ground as snow.
Ice Flare astronomy A sudden increase in the brightness of a planet or moon’s icy surface, caused by the reflection of sunlight off of ice crystals.
Ice Floe Geological Floating Ice
Ice Flow geography The continuous movement of a glacier or ice sheet, driven by gravity and internal deformation
Ice Flower Botanical Frozen Flower
Ice Fog Meteorological Frozen Mist
Ice Grotto Glaciology A cave-like formation within a glacier
Ice Hockey sport A team sport played on ice, where players use sticks to shoot a puck into the opposing team’s net.
Ice Island Geology A large, floating mass of ice that has broken off from a glacier or ice shelf.
Ice Jam Hydrology A blockage of ice in a river or stream
Ice Jams hydrology A accumulation of ice in a river or stream, causing water to back up and potentially flood the surrounding area.
Ice Keel Oceanography The submerged portion of an iceberg
Ice Knife Glaciology A sharp, knife-like projection of ice
Ice Lens Optical Frozen Lens
Ice Lensing optics The distortion of light caused by the refraction of light through a layer of ice or ice crystals.
Ice Maker Technology A device that produces ice
Ice Needle Geological Frozen Spikes
Ice Nucleation chemistry The process by which solid ice crystals form from liquid water or water vapor.
Ice Pack Geological Frozen Water
Ice Palace architecture A large, temporary structure made of ice, often used for events or as a tourist attraction.
Ice Pellets Meteorological Frozen Precipitation
Ice Petrel Biology A seabird species found in the Southern Ocean that nests on rocky cliffs and feeds on krill and other small marine life.
Ice Plant Botanical Succulent
Ice Raft geology a floating mass of ice that has broken off from a glacier or ice sheet
Ice Rampart Geology A ridge or wall of ice formed by the compressive movement of sea ice or lake ice.
Ice Recession Geology The gradual retreat of glaciers or ice sheets due to climate change or other factors.
Ice Rift Geology A crack or fissure that forms in the surface of a glacier or ice sheet.
Ice Shelf Geological Floating Ice
Ice Shove meteorology the forceful movement of ice sheets or floes caused by strong winds or currents
Ice Storm Meteorological Frozen Precipitation
Ice Thrust geology the uplifting of land caused by the expansion of ice during freezing
Ice Wedge Geological Frozen Crack
Ice Worm Biology A small, segmented worm that lives in the ice of glaciers and snowfields.
Iceberg Geological Floating Ice
Iceberg Alley geography A region in the North Atlantic Ocean where large icebergs calved from glaciers in Greenland and Canada’s eastern Arctic frequently travel.
Iceberg Calving geology The process by which large chunks of ice, known as icebergs, break off from glaciers or ice shelves and enter the ocean.
Iceberg Towing engineering The practice of intentionally moving icebergs, typically to provide a freshwater source or to use as a means of cooling in hot climates.
Icebox Effect Meteorology A phenomenon where a body of water, such as a lake or ocean, maintains a lower temperature than the surrounding land.
Icefield geography A large, expansive area covered by interconnected glaciers
Iceworm zoology a small, segmented worm that lives in the ice of glaciers and snow fields
Ichneumon Wasp Animal Parasitic Wasp
Ichthyology biology The scientific study of fish, including their anatomy, physiology, behavior, and evolution.
Icicle Geological Frozen Water
Icicle Formation physics The process by which long, pointed ice formations known as icicles form on surfaces exposed to cold temperatures.
Ideation biology The mental process of generating new ideas or concepts
Igneous Rock geology Rock formed through the solidification of molten or partially molten material
Ignis Fatuus Nature A ghostly light seen over bogs, swamps, and marshes
Iguana Animal Lizard
Illumination botany The amount of light available for photosynthesis in a given environment
Imbibition botany The absorption of water by a seed or other plant structure, causing it to swell
Immiscible chemistry The inability of two liquids to mix and form a homogeneous solution
Impala Nature A medium-sized antelope native to southern and eastern Africa.
Impermeable geology a material or substance that does not allow fluids to pass through it
Impervious ecology A surface or material that does not allow water or other fluids to pass through
Imprinting ethology A type of learning in which an animal forms an attachment to the first moving object it encounters
Incandescent Fungus Biological Bioluminescent Fungus
Incandescent Glow physics The emission of visible light from a hot, solid object, such as a heated filament or glowing embers.
Inchworm Nature The larval stage of certain moth and butterfly species that moves by looping its body in a characteristic ‘inching’ motion.
Inclination geography The angle at which a surface, such as a slope or a magnetic field, is inclined relative to the horizontal
Increaser Plant Botanical Weed
Indian Pipe Botanical Saprophytic Plant
Indian Sandalwood Botanical Aromatic Tree
Indicator Species Biological Ecological Marker
Indigo Bunting Animal Bird
Inert Gas chemistry A gaseous element that is chemically unreactive under normal conditions
Infertile biology Lacking the ability to produce offspring or reproduce
Infiltration hydrology the process by which water enters the soil or other porous material
Ingestion biology The act of taking food, liquid, or other substances into the body
Ink Cap Mushroom Biological Fungus
Inkberry Nature An evergreen shrub native to eastern North America with dark berries that can be used to make ink.
Inorganic chemistry Relating to or denoting compounds not containing carbon-hydrogen bonds
Inorganic Compound chemistry a chemical compound that does not contain carbon-hydrogen bonds
Insect Migration biology The seasonal movement of insects, often over long distances, in search of more favorable environmental conditions or resources.
Insect Repellent Chemical Pest Control
Insectarium biology A facility, such as a museum or zoo, that houses collections of insects and other arthropods for the purpose of research, education, and public display.
Insecticide Chemical Pest Control
Insectivorous Plant Botanical Carnivorous Plant
Instant Snow Chemical Artificial Snow
Instinctual ethology Involving an innate, typically fixed pattern of behavior in response to certain stimuli
Interfluve geography The area of higher ground between two adjacent river valleys
Interglacial geology A period of milder climate between two glacial periods within an ice age
Intermittent Stream hydrology a stream or river that only flows periodically, such as during wet seasons
Internode botany The section of a plant stem between two nodes, where leaves or branches are attached
Interstitial Water Geological Ground Water
Intertidal ecology The area of a seashore that is exposed to the air at low tide and submerged at high tide
Intertidal Zone Ecological Coastal Area
Introgression biology The transfer of genetic material from one species to another through hybridization and backcrossing
Intrusion geology The emplacement of igneous rock into pre-existing rock formations
Inundation geography The flooding of an area of land by water, either temporarily or permanently
Invasive Species ecology A non-native organism that is introduced, either intentionally or unintentionally, to an ecosystem where it is not naturally found, and whose presence and proliferation can cause significant harm to the local environment, economy, or human health.
Inversion meteorology a reversal of the normal decrease in air temperature with increasing altitude
Invertebrate zoology An animal that lacks a backbone or spinal column
Iridescent Cloud Nature A cloud that displays a rainbow-like spectrum of colors
Iris Botanical Flowering Plant
Iron Oxide Geological Mineral Compound
Isobars Meteorological Atmospheric Pressure
Isobath Nature A line on a map connecting points of equal depth in a body of water
Isohaline Oceanographic Water Salinity
Isothermal Layer Nature A layer of the ocean where temperature is constant with depth
Isotherms Meteorological Temperature Lines
Isothiocyanate Chemical Organic Compound
Ivy Nature A climbing or trailing evergreen plant with characteristic lobed leaves

Descriptions

Ibex
A mountain-dwelling goat-like animal with large curved horns, known for its agility and ability to navigate steep, rocky terrain.
Ice Age
During an Ice Age, large ice sheets and glaciers cover much of the planet’s surface, significantly altering the environment and climate.
Ice Apron
An ice apron is a thick layer of ice that forms at the base of a steep mountain or cliff, often as a result of avalanches and other mass movements of snow and ice.
Ice Axe
Ice Blink
Ice Blink appears as a bright, whitish glare on the horizon, indicating the presence of ice or snow in the distance, even when the ice itself is not directly visible.
Ice Block
An ice block is a large, solid piece of ice that has broken off from a glacier, iceberg, or other ice formation.
Ice Bomb
Ice Bridge
Ice Buoy
An ice buoy is a floating device used to measure and monitor various characteristics of sea ice, such as its thickness, movement, and temperature.
Ice Cap
Ice Castle
Ice castles are often constructed during winter in cold climates, using techniques such as spraying water over a frame to build up layers of ice. They can feature elaborate designs, towers, and illumination, and are popular tourist destinations.
Ice Cave
Ice Core
Ice Cream Cone Geyser
Ice Cream Cone Geyser is a unique geyser found in Yellowstone National Park that erupts in the distinctive shape of an ice cream cone due to the deposition of silica around the vent.
Ice Cream Plant
The ice cream plant, also known as the ‘snowball plant,’ is a succulent plant that produces a cooling sensation when touched, due to the presence of specialized glands that release a refreshing, menthol-like substance.
Ice Crystal
An ice crystal is a solid, crystalline form of water that forms in the atmosphere, often resulting in the formation of snow, frost, or other atmospheric phenomena.
Ice Crystal Cloud
Ice Crystal Clouds, such as cirrus clouds, are found at altitudes where temperatures are below freezing, allowing water vapor to condense directly into ice crystals rather than liquid water.
Ice Crystals
Shapes formed from the solidification of water, often found in cold environments and atmospheric conditions.
Ice Dam
Ice dams can form when warm temperatures cause snow and ice to melt, and the resulting water refreezes, creating a barrier that prevents further drainage. This can lead to flooding and damage to nearby structures.
Ice Drift
Ice Dune
Ice Dunes are found in polar regions and high-altitude areas where strong winds and low temperatures allow ice to form into distinctive dune-like structures.
Ice Fan
An ice fan is a fan-shaped glacial formation that occurs when a glacier flows over a steep, rugged terrain, creating a ‘fanning’ pattern of ice lobes or tongues.
Ice Field
Ice Fishing
Ice Flake
Ice flakes are the basic building blocks of snowflakes, forming when water vapor condenses and freezes in the cold, high-altitude air of clouds.
Ice Flare
Ice flares are often observed on the icy moons of Jupiter and Saturn, and can provide information about the composition and structure of their surfaces.
Ice Floe
A large, flat piece of ice floating in open water, often found in polar regions.
Ice Flow
Ice Flower
A pattern of ice crystals that forms on cold surfaces, resembling delicate flower petals.
Ice Fog
A type of fog composed of tiny, suspended ice crystals that occurs in extremely cold temperatures.
Ice Grotto
An ice grotto is a cave-like formation within a glacier, typically created by meltwater erosion or the collapse of an ice tunnel.
Ice Hockey
Ice hockey is a popular winter sport, played professionally, internationally, and at the recreational level. It requires specialized equipment, such as skates, sticks, and protective gear, and is known for its fast-paced action and physical nature.
Ice Island
Ice Islands are found in polar regions, particularly the Arctic, and can be several kilometers in diameter and hundreds of meters thick, posing a hazard to shipping and other activities.
Ice Jam
An ice jam is a blockage of ice that forms in a river or stream, often occurring during the spring thaw or when ice breaks up, leading to flooding and other hazards.
Ice Jams
Ice jams can form when a river or stream is partially or completely blocked by ice, often occurring during the spring thaw when large chunks of ice break up and become stuck. This can lead to sudden and unpredictable flooding events.
Ice Keel
The ice keel is the portion of an iceberg that is submerged beneath the water, typically much larger than the visible portion above the surface.
Ice Knife
An ice knife is a sharp, knife-like projection of ice that forms on the surface of a glacier or ice sheet, often as a result of melting and refreezing processes.
Ice Lens
A lens-shaped piece of ice that can refract and focus light, creating unique optical effects.
Ice Lensing
Ice lensing can create a variety of optical effects, such as halos, sundogs, and mock suns, which are caused by the bending of light as it passes through the complex structures of ice crystals in the atmosphere.
Ice Maker
An ice maker is a device or appliance that produces ice, typically used in commercial or household settings to provide a consistent supply of ice for various purposes.
Ice Needle
Slender, pointed ice formations that can grow vertically from cold surfaces.
Ice Nucleation
Ice nucleation is an important process in cloud formation, precipitation, and the freezing of bodies of water. It can be influenced by the presence of certain particles or compounds, which act as ‘ice nuclei’ and facilitate the formation of ice crystals.
Ice Pack
A large, continuous area of sea ice that covers a significant portion of an ocean or lake.
Ice Palace
Ice palaces are typically constructed during the winter in cold climates, using techniques such as carving and spraying water to create intricate designs and features. They can be illuminated and used for a variety of purposes, such as hosting festivals or serving as a backdrop for winter activities.
Ice Pellets
Small, translucent or white balls of ice that fall from clouds, also known as ‘sleet’.
Ice Petrel
The Ice Petrel is well-adapted to the harsh Antarctic environment, with a thick, waterproof plumage and the ability to forage for food in the open ocean.
Ice Plant
A type of succulent plant with fleshy, icy-looking leaves that can grow in cold, dry environments.
Ice Raft
An ice raft is a large, flat piece of ice that has broken off from a glacier or ice sheet and is floating on the surface of a body of water, such as a lake or the ocean. Ice rafts can transport sediments and other material as they drift.
Ice Rampart
Ice Ramparts can be several meters high and are created by the dynamic forces that push and deform sea or lake ice, often forming along the shoreline.
Ice Recession
Ice Recession is a concerning trend observed in many parts of the world, as rising temperatures and changing precipitation patterns lead to the melting and retreat of large ice masses, with significant implications for sea levels and ecosystems.
Ice Rift
Ice Rifts can be several meters wide and can gradually grow in size, eventually leading to the calving of icebergs or the fragmentation of larger ice masses.
Ice Shelf
A large, thick expanse of ice attached to a coastline, often extending out over the ocean.
Ice Shove
An ice shove occurs when strong winds or currents push large sheets or floes of ice with great force, often causing damage to shorelines, docks, or other structures in their path. This can be a significant hazard in areas with large bodies of water that freeze over during the winter.
Ice Storm
A weather event where rain or drizzle freezes on contact with cold surfaces, creating a layer of ice.
Ice Thrust
Ice thrust, also known as ice push, is a geological process where the expansion of ice during the freezing process can cause the land surface to be pushed or uplifted. This can create distinctive landforms such as ice-shoved ridges or ice-thrust blocks.
Ice Wedge
A vertical, wedge-shaped formation of ice that forms in permafrost due to the expansion and contraction of the soil.
Ice Worm
Ice Worms are adapted to survive in the freezing temperatures of glacial environments, feeding on algae and other organic matter trapped within the ice.
Iceberg
A large, floating block of ice that has broken off from a glacier or ice shelf and drifts in open water.
Iceberg Alley
Iceberg Alley is located off the east coast of Newfoundland and Labrador, Canada, and is a major hazard for ships navigating the area. The icebergs, some of which can be hundreds of feet tall, pose a significant threat to maritime activities and have been involved in numerous historical incidents, including the sinking of the Titanic.
Iceberg Calving
Iceberg calving is an important part of the glacial cycle, as it helps to maintain the balance between ice accumulation and ice loss. The process is driven by a variety of factors, including changes in temperature, sea level, and the mechanical properties of the ice itself.
Iceberg Towing
Iceberg towing has been explored as a potential solution to water scarcity in some regions, as icebergs can contain vast amounts of fresh water. The process involves using tugs or other vessels to slowly guide icebergs to their desired location, though the feasibility and environmental impacts of this practice are still being studied.
Icebox Effect
The Icebox Effect occurs because water has a higher specific heat capacity than land, meaning it takes more energy to heat or cool a body of water compared to the surrounding land, leading to a temperature moderation effect.
Icefield
Iceworm
Iceworms are small, thin worms that live within the ice of glaciers and snow fields in cold regions. They are adapted to thrive in the harsh, frigid environment and play a role in the ecosystem of these icy habitats.
Ichneumon Wasp
A type of wasp that lays its eggs inside the larvae or pupae of other insects, parasitizing them.
Ichthyology
Ichthyologists are experts in the field of fish biology, and their research helps to improve our understanding of aquatic ecosystems, conservation efforts, and the commercial and recreational use of fish resources.
Icicle
A narrow, pointed piece of ice that forms when water drips and freezes, often hanging from surfaces like roofs or tree branches.
Icicle Formation
Icicle formation occurs when water drips or seeps from a surface and freezes in a downward-facing position. The shape and size of icicles can be influenced by factors such as temperature, wind, and the availability of water, and they are a common sight in cold, snowy environments.
Ideation
Igneous Rock
Ignis Fatuus
Ignis fatuus, also known as ‘will-o’-the-wisp’, is a ghostly light that appears over bogs, swamps, and marshes, often thought to be supernatural in origin. The light is caused by the natural combustion of gases produced by the decomposition of organic matter.
Iguana
A large, tropical lizard known for its distinctive appearance, including a prominent dorsal crest and dewlap.
Illumination
Imbibition
Immiscible
Impala
Impalas are known for their elegant leaping abilities and their distinctive curved horns. They typically live in herds and graze on a variety of grasses and shrubs.
Impermeable
Impermeable materials, such as certain types of rock or clay, do not allow water or other fluids to pass through them. This property is important in various geological and engineering applications, such as the construction of dams or the containment of hazardous waste.
Impervious
Imprinting
Incandescent Fungus
A type of fungus that can produce a natural, glowing light through a bioluminescent chemical reaction.
Incandescent Glow
Incandescent glow is the result of the thermal excitation of atoms or molecules within the heated material, causing them to release energy in the form of electromagnetic radiation. This phenomenon is the basis for traditional incandescent light bulbs, as well as the glow of certain types of fires and other high-temperature processes.
Inchworm
Inchworms get their name from their distinctive ‘measuring’ gait, which they use to navigate plants and trees in search of food.
Inclination
Increaser Plant
A plant that increases in abundance when an ecosystem is overgrazed or disturbed, often considered a weed.
Indian Pipe
A non-photosynthetic, ghostly-white plant that lacks chlorophyll and derives nutrients from decaying organic matter in the soil.
Indian Sandalwood
A fragrant, evergreen tree native to parts of India, known for its valuable, aromatic wood.
Indicator Species
A species whose presence, abundance, or absence can be used to measure the overall health and condition of an ecosystem.
Indigo Bunting
A small songbird known for its vibrant, iridescent blue plumage, which is more pronounced in the male of the species.
Inert Gas
Infertile
Infiltration
Infiltration is the process by which water, such as from precipitation or irrigation, enters the soil or other porous materials, like rocks or gravel. This is an important hydrological process that replenishes groundwater and affects the movement of water through the subsurface.
Ingestion
Ink Cap Mushroom
A type of mushroom that undergoes a unique process of self-digestion, resulting in a black, inky liquid.
Inkberry
Inkberry leaves and berries contain tannins that can be extracted and used as a natural black ink, making it a useful resource for indigenous communities.
Inorganic
Inorganic Compound
Inorganic compounds are chemical compounds that do not contain carbon-hydrogen bonds, with the exception of carbon monoxide, carbon dioxide, and carbonic acid. Inorganic compounds include salts, minerals, and metals, and they are often found in the non-living parts of the natural environment.
Insect Migration
Many insects, such as butterflies, dragonflies, and some species of moths, engage in migratory behavior, traveling from one region to another in response to changes in temperature, food availability, or other factors. The study of insect migration helps scientists understand the complex life cycles and behaviors of these important organisms.
Insect Repellent
A substance applied to skin, clothing, or the environment to deter insects from biting or approaching.
Insectarium
Insectariums often feature a wide variety of live and preserved insect specimens, allowing visitors to observe and learn about the diversity, ecology, and importance of these invertebrates. These facilities play a crucial role in promoting public understanding and appreciation of the natural world.
Insecticide
A substance used to kill or repel insects, often used in agricultural and urban settings to control pest populations.
Insectivorous Plant
A plant that derives some of its nutrients by trapping and digesting insects and other small prey.
Instant Snow
A polymer-based powder that, when mixed with water, expands and forms a fluffy, snow-like material.
Instinctual
Interfluve
Interglacial
Intermittent Stream
An intermittent stream is a watercourse that only flows during certain times of the year, typically during periods of higher precipitation or snowmelt. These streams may be dry for extended periods, and their flow can be highly dependent on seasonal or climatic conditions.
Internode
Interstitial Water
The water found in the porous spaces between sediment grains or rock fractures underground.
Intertidal
Intertidal Zone
The area of the shoreline that is exposed to the air at low tide and submerged at high tide, home to a unique set of adapted organisms.
Introgression
Intrusion
Inundation
Invasive Species
Invasive species can outcompete and displace native species, disrupt ecological processes, and have far-reaching consequences for the affected ecosystems. Examples of invasive species include the Burmese python in the Florida Everglades, the zebra mussel in the Great Lakes, and the Kudzu vine in the southeastern United States.
Inversion
An inversion is a meteorological phenomenon in which the normal decrease in air temperature with increasing altitude is reversed, with the air temperature actually increasing with height. This can trap pollutants and prevent the normal vertical mixing of the atmosphere, leading to poor air quality. — MORE AVAILABLE —
Invertebrate
Iridescent Cloud
Iridescent clouds, also called ‘cloud iridescence’, are clouds that display a spectrum of brilliant colors, including pink, green, blue, and violet. This phenomenon is caused by the diffraction of sunlight through the small water droplets or ice crystals in the clouds.
Iris
A genus of flowering plants known for their distinctive, showy, often colorful flowers.
Iron Oxide
A chemical compound composed of iron and oxygen, often found in the form of rust or hematite.
Isobars
Lines on a weather map that connect points of equal atmospheric pressure.
Isobath
An isobath is a contour line on a map or chart that connects points of equal depth in a body of water, such as an ocean, sea, or lake. Isobaths are useful for understanding the underwater topography and identifying features like underwater ridges, valleys, and trenches.
Isohaline
A line on a map or diagram that connects points of equal salinity or dissolved salt content in a body of water.
Isothermal Layer
The isothermal layer, also known as the ‘mixed layer’, is a layer of the ocean where the temperature is constant with depth. This layer is typically found near the surface of the ocean and is important for understanding ocean circulation and the distribution of marine life.
Isotherms
Lines on a map or diagram that connect points of equal temperature.
Isothiocyanate
A class of organic compounds derived from glucosinolates found in certain plants, known for their pungent odor and potential health benefits.
Ivy
Ivy is a genus of evergreen climbing or trailing plants that have distinctive lobed leaves. Ivy is known for its ability to climb up walls and tree trunks, and it is often used as a ground cover or decoration in gardens and landscapes.

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