/ Dictionary / Index H heteroauxin: Meaning and Definition of Find definitions for: het•er•o•aux•in Pronunciation: (het"u-rō-ôk'sin), [key] — n. Biochem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heteroatom heterocercal Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language