/ Dictionary / Index G gemmaceous: Meaning and Definition of Find definitions for: gem•ma•ceous Pronunciation: ( je-mā'shus), [key] — adj. of, pertaining to, or resembling gemmae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gemma gemmate Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language