/ Dictionary / Index G gametothallus: Meaning and Definition of Find definitions for: ga•me•to•thal•lus Pronunciation: (gu-mē"tu-thal'us, gam"i-), [key] — n. Mycol. a gamete-producing thallus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gametophyte game warden Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language