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[floo r-ahyd, flawr-, flohr-] /ˈflʊər aɪd, ˈflɔr-, ˈfloʊr-/
noun, Chemistry.
a salt of hydrofluoric acid consisting of two elements, one of which is fluorine, as sodium fluoride, NaF.
a compound containing fluorine, as methyl fluoride, CH 3 F.
Origin of fluoride
First recorded in 1820-30; fluor- + -ide
Can be confused Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for fluoride


any salt of hydrofluoric acid, containing the fluoride ion, F
any compound containing fluorine, such as methyl fluoride
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for fluoride

1826, "binary compound of fluorine with another element," from fluorine + -ide.

Online Etymology Dictionary, © 2010 Douglas Harper
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fluoride in Medicine

fluoride fluor·ide (flur'īd', flôr'-)

  1. A compound of fluorine with another element.

  2. The univalent anion of fluorine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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fluoride in Science
A compound containing fluorine and another element or radical. Fluorine combines readily with nearly all the other elements, except the noble gases, to form fluorides. In some countries, fluoride is added to the drinking water as a preventive measure against tooth decay.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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fluoride in Culture
fluoride [(floor-eyed, flawr-eyed)]

Any of a number of naturally occurring compounds of the element fluorine. Fluorides have been found to be effective in preventing tooth decay and are routinely added to drinking water in most jurisdictions.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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