/ Dictionary / Index I isogamous: Meaning and Definition of Find definitions for: i•sog•a•mous Pronunciation: (ī-sog'u-mus), [key] — adj. Biol. having two similar gametes in which no differentiation can be distinguished, or reproducing by the union of such gametes (opposed to heterogamous). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isogamete isogamy Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language