/ Dictionary / Index G greenhouse gas: Meaning and Definition of Find definitions for: green'house gas" Pronunciation: [key] any of the gases whose absorption of solar radiation is responsible for the greenhouse effect, including carbon dioxide, methane, ozone, and the fluorocarbons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. greenhouse effect greenhouse whitefly Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language