/ Dictionary / Index G gamo-: Meaning and Definition of Find definitions for: gamo- Pronunciation: [key] a combining form meaning “joined, united,” “joining, union,” used in the formation of compound words: gamopetalous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gammy gamogenesis Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language