/ Dictionary / Index F fibroid: Meaning and Definition of Find definitions for: fi•broid Pronunciation: (fī'broid), [key] — adj. resembling fiber or fibrous tissue. composed of fibers, as a tumor. —n. fibroma. leiomyoma. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fibroid (Thesaurus) fibrocystic disease fibroin Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language