/ Dictionary / Index H heterodactylous: Meaning and Definition of Find definitions for: het•er•o•dac•ty•lous Pronunciation: (het"u-rō-dak'tu-lus), [key] — adj. Ornith. having the first and fourth toes directed backward, and the second and third forward, as in trogons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. heterocyst heterodox Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language