Browse Lemmas - Multilingual Dictionary Editor

halo

A ring of light around the sun, moon, or another bright object, caused by reflection or refraction in the atmosphere.

Noun natural_feature Level 1050

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hazard

A danger or risk, especially a source of possible harm, injury, or loss.

Noun abstract_condition Level 1050

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hydrochloric

Relating to or denoting hydrochloric acid, a strong acid consisting of hydrogen chloride dissolved in water.

Adjective chemical_physical Level 1050

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hydrolysis

A chemical reaction in which a compound is broken down by reacting with water, often producing new substances from the compound’s components.

Noun chemical_compound Level 1050

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hydroxide

A chemical compound containing one or more hydroxyl groups, especially a compound formed when a metal or positive ion combines with the hydroxide ion ...

Noun chemical_compound Level 1050

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inert

Lacking the ability or strength to move or act; motionless and inactive.

Adjective condition Level 1050

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inertia

A tendency to remain inactive, unchanged, or unwilling to act or move forward.

Noun abstract_condition Level 1050

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inertial

Relating to inertia, especially the tendency of an object to remain at rest or continue moving uniformly unless acted on by an external force.

Adjective physical_property Level 1050

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inorganic

Not consisting of or derived from living matter; relating to substances that are not produced by living organisms, especially in chemistry.

Adjective biological_type Level 1050

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instantaneous

Existing or measured at a particular instant rather than over a period of time, especially in physics or mathematics.

Adjective temporal_status Level 1050

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interaction

The process in which two or more people or things communicate, act, or influence one another.

Noun process_event Level 1050

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interstellar

Existing, occurring, or situated between stars.

Adjective spatial_orientation Level 1050

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ionic

Relating to ions or involving electrically charged atoms or molecules.

Adjective chemical_physical Level 1050

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ionization

The process by which an atom or molecule gains or loses one or more electrons and becomes an ion.

Noun process_event Level 1050

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isotope

One of two or more atoms of the same chemical element that have the same number of protons but different numbers of neutrons, and therefore different ...

Noun chemical_compound Level 1050

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kinetic

Relating to the energy possessed by an object because of its motion.

Adjective chemical_physical Level 1050

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kinetic

Relating to or caused by motion.

Adjective physical_property Level 1050

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laboratory

A room or building equipped for scientific research, testing, experiments, or analysis.

Noun building_structure Level 1050

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lithosphere

The rigid outer layer of Earth, consisting of the crust and the uppermost solid mantle, and lying above the softer asthenosphere.

Noun natural_feature Level 1050

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luminosity

The quality or degree of giving off or reflecting light; brightness.

Noun quality_attribute Level 1050

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magma

Molten or partly molten rock beneath the Earth's surface, from which igneous rocks form when it cools.

Noun natural_feature Level 1050

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mantle

A layer surrounding or covering something, especially the Earth beneath the crust or the tissue surrounding an organ.

Noun natural_feature Level 1050

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measurement

The act or process of determining the size, amount, length, or other physical quantity of something using a standard unit or instrument.

Noun process_event Level 1050

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measurement

A value obtained by measuring something, usually expressed with a number and a unit.

Noun quantitative_concept Level 1050

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mechanism

A system of parts that work together, especially in a machine, to produce a particular movement or result.

Noun tool Level 1050

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mercury

The planet closest to the Sun in the solar system.

Noun geographic_place Level 1050

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metallic

Having the distinctive shine, hardness, or appearance of metal.

Adjective physical_property Level 1050

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metallic

Relating to, made of, or resembling metal.

Adjective material Level 1050

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methanol

A colorless, volatile, flammable, poisonous alcohol used as a solvent, fuel, and industrial chemical.

Noun chemical_compound Level 1050

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mineral

Containing, relating to, or made from minerals.

Adjective material Level 1050

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mineral

A naturally occurring inorganic solid substance with a characteristic chemical composition and crystal structure, such as quartz or feldspar.

Noun material_substance Level 1050

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mitosis

A type of cell division in which one parent cell divides to produce two genetically similar daughter cells, usually with the same chromosome number as...

Noun process_event Level 1050

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monoxide

A chemical compound whose molecules contain one oxygen atom bonded to another element.

Noun chemical_compound Level 1050

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nitrate

A salt or ester of nitric acid, containing the nitrate ion NO₃⁻.

Noun chemical_compound Level 1050

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observer

A person who watches or pays attention to something, especially an event or situation, without taking part in it.

Noun human Level 1050

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orbital

Relating to an atomic or molecular orbital, especially the region in which an electron is likely to be found.

Adjective chemical_physical Level 1050

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orbital

Relating to, resembling, or moving in an orbit around a celestial body or other object.

Adjective spatial_orientation Level 1050

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oxide

A chemical compound in which oxygen is combined with another element or group of elements.

Noun chemical_compound Level 1050

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ozone

A pale-blue gas with a sharp smell, consisting of three oxygen atoms per molecule and formed naturally in the atmosphere or used as a disinfectant.

Noun chemical_compound Level 1050

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pathway

A path, track, or route for walking or traveling, especially a narrow one.

Noun path_infrastructure Level 1050

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peroxide

A chemical compound containing an oxygen–oxygen bond, especially one used as an oxidizing agent or disinfectant.

Noun chemical_compound Level 1050

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phenomena

Observable events, occurrences, or facts, especially those studied scientifically.

Noun process_event Level 1050

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phosphate

A salt or ester of phosphoric acid, containing phosphorus and oxygen, often used in fertilizers, detergents, and biological processes.

Noun chemical_compound Level 1050

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polar

Having two opposite poles or end points, especially in physics or geometry.

Adjective spatial_orientation Level 1050

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projectile

Relating to or caused by the motion of an object thrown or launched through the air.

Adjective physical_property Level 1050

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propane

A colorless, highly flammable gaseous hydrocarbon (C₃H₈), commonly stored as a liquid under pressure and used as a fuel for heating, cooking, and vehi...

Noun chemical_compound Level 1050

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proton

A stable subatomic particle with a positive electric charge, found in the nucleus of an atom; the number of protons determines the atom's atomic numbe...

Noun chemical_compound Level 1050

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radioactive

Emitting radiation as a result of the spontaneous decay of unstable atomic nuclei.

Adjective chemical_physical Level 1050

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rainbow

A curved band of colored light, usually seen in the sky opposite the sun when sunlight is refracted and reflected by raindrops.

Noun natural_feature Level 1050

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reactor

A device or vessel in which a controlled nuclear fission reaction produces energy, radiation, or materials.

Noun electronic_device Level 1050

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