Dictionary
fluoro-
1. a combining form with the meanings “fluorine,” “fluoride,” used in the formation of compound words:
fluorocarbon.
2. a combining form with the meaning “fluorescence,” used in the formation of compound words:
fluoroscopy. Also,fluo-; esp. before a vowel,fluor-.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.