Topic Navigator

Noun Tree | Nouns Groups | Verb Groups | Search

Parent Categories

entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

matter go
that which has mass and occupies space

fluid go
continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas

gas go
a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely

greenhouse gas, greenhouse emission
a gas that contributes to the greenhouse effect by absorbing infrared radiation

noun.substance

5 Subcategories

chlorofluorocarbon, CFC go
a fluorocarbon with chlorine
carbon dioxide, CO2, carbonic acid gas go
a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances
hydrofluorocarbon, HFC go
a fluorocarbon emitted as a by-product of industrial manufacturing
perfluorocarbon, PFC go
a powerful greenhouse gas emitted during the production of aluminum
sulfur hexafluoride, sulphur hexafluoride go
a colorless gas that is soluble in alcohol and ether