Etymology
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fluorine (n.)

non-metallic element, 1813, coined by English chemist Sir Humphry Davy from fluorspar ("calcium fluoride," modern fluorite), the late 18c. name of the mineral where it was first found (see fluor) + chemical suffix -ine (2). Not isolated until 1886. Related: Fluorinate; fluorination.

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Definitions of fluorine

fluorine (n.)
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;
Synonyms: f / atomic number "
From wordnet.princeton.edu