1. A nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
   - F, atomic number 9

Derived forms: fluorines

Type of: chemical element, element, gas, halogen

Part of: cryolite, fluor, fluorapatite, fluorite, fluorspar, Greenland spar

Encyclopedia: Fluorine

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