/ Dictionary / Index F flaccid: Meaning and Definition of Find definitions for: flac•cid Pronunciation: (flak'sid, flas'id), [key] — adj. soft and limp; not firm; flabby: flaccid biceps. lacking force; weak: flaccid prose. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: flaccid (Thesaurus) flabellum flack Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language