/ Dictionary / Index H heterochthonous: Meaning and Definition of Find definitions for: het•er•och•tho•nous Pronunciation: (het"u-rok'thu-nus), [key] — adj. not indigenous; foreign (opposed to autochthonous): heterochthonous flora and fauna. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heterochrony heteroclite Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language