/ Dictionary / Index H heterogenous: Meaning and Definition of Find definitions for: het•er•og•e•nous Pronunciation: (het"u-roj'u-nus), [key] — adj. Biol., Pathol. having its source or origin outside the organism; having a foreign origin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heterogenous (Thesaurus) heterogenetic heterogonous Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language