noun \ˈflr-ˌēn, ˈflr-\

Definition of FLUORINE

:  a nonmetallic halogen element that is isolated as a pale yellowish flammable irritating toxic diatomic gas — see element table

Origin of FLUORINE

French, from New Latin fluor
First Known Use: 1813


noun \ˈfl(-ə)r-ˌēn, -ən\   (Medical Dictionary)

Medical Definition of FLUORINE

: a nonmetallic monovalent halogen element that is normally a pale yellowish flammable irritating toxic gas—symbol Fahrenheit; see element table


noun    (Concise Encyclopedia)

Nonmetallic chemical element, chemical symbol F, atomic number 9. The lightest halogen, it is the most reactive element, forming compounds with all others except helium, neon, and argon (the lighter noble gases). Its only valence is 1, in F (the diatomic molecule) and fluorides. A toxic, pale yellow gas with a pungent odour, it can be produced only by electrolysis under special conditions. Its chief source is fluorite; it also occurs in cryolite, fluorapatite, seawater, bones, and teeth. Hydrogen fluoride (HF) is a raw material for many other fluorides. Its water solution, hydrofluoric acid, is used to clean metals and to polish, etch, or frost glass. Other fluorides are useful catalysts and raw materials. Sodium fluoride (NaF) is added to water and tin fluoride (SnF) to dental-care products to reduce dental caries (see fluoridation of water). Fluorocarbons are hydrocarbons in which some hydrogen atoms have been replaced by fluorine atoms; examples include Freons and Teflon.


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