[floo-awr, -er]

1615–25; < Latin fluor a flowing; so called from its use as a flux

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variant of fluoro- before a vowel: fluorene; fluoric.
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World English Dictionary
fluor (ˈfluːɔː)
another name for fluorspar
[C17: from Latin: a flowing; so called from its use as a metallurgical flux]

combining form
a variant of fluoro- : fluorene; fluorine

fluorspar or fluor (ˈflʊəˌspɑː)
Also: fluorite a white or colourless mineral sometimes fluorescent and often tinted by impurities, found in veins and as deposits from hot gases. It is used in the manufacture of glass, enamel, and jewellery, and is the chief ore of fluorine. Composition: calcium fluoride. Formula: CaF2. Crystal structure: cubic
fluor or fluor

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American Heritage
Medical Dictionary

fluor- pref.
Variant of fluoro-.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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