/ Dictionary / Index F fibro-: Meaning and Definition of Find definitions for: fibro- Pronunciation: [key] a combining form meaning “fiber,” used in the formation of compound words: fibrolite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fibrinolysis fibroadenoma Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language