/ Dictionary / Index I infauna: Meaning and Definition of Find definitions for: in•fau•na Pronunciation: (in'fô"nu), [key] — pl. -nas, -nae the aggregate of organisms that burrow into and live in the bottom deposits of the ocean. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. infatuation infeasible Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language