/ Dictionary / Index F fluoro-: Meaning and Definition of Find definitions for: fluoro- Pronunciation: [key] a combining form with the meanings “fluorine,” “fluoride,” used in the formation of compound words: fluorocarbon. a combining form with the meaning “fluorescence,” used in the formation of compound words: fluoroscopy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fluorite fluorocarbon Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language