/ Dictionary / Index F fibr-: Meaning and Definition of Find definitions for: fibr- Pronunciation: [key] var. ofbefore a vowel: fibrin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Fibonacci numbers fibratus Related Content Daily Word Quiz: draconian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language