/ Dictionary / Index M microfauna: Meaning and Definition of Find definitions for: mi•cro•fau•na Pronunciation: (mī"krō-fô'nu), [key] — pl. -nas, -nae microscopic animals. the fauna of a microhabitat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. microfarad microfiber Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language