/ Dictionary / Index I isogenous: Meaning and Definition of Find definitions for: i•sog•e•nous Pronunciation: (ī-soj'u-nus), [key] — adj. Biol. of the same or similar origin, as parts derived from the same or corresponding tissues of the embryo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isogamy isogeotherm Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language