[floo r-ahyd, flawr-, flohr-]
- 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, CH3F.
Origin of fluoride
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for fluoride
As an example of good science-and-society policymaking, the history of fluoride may be more of a cautionary tale.
Fluoride first entered an American water supply through a rather inelegant technocratic scheme.
Really, is it any wonder that fluoride should freak people out?
Placed in drinking water, fluoride can serve people who otherwise have poor access to dental care.
Since the 1950s, fluoride has adapted itself to the prevailing concerns of the time.
It may be prepared by the action of hydrofluoric acid upon lime, as directed under Barium, Fluoride of.
The clarified solution of fluoride of sodium is then drawn off, and the alumina treated as above described.
The fluoride of calcium, or fluorspar, may be used for this experiment.
Its properties agree with those of the fluoride of iodine prepared by Gore by the action of iodine on silver fluoride.
Sulphur dioxide is likewise decomposed in the cold, with production of a yellow flame and formation of fluoride of sulphur.
- 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
Word Origin and History for fluoride
Online Etymology Dictionary, © 2010 Douglas Harper
- A compound of fluorine with another element.
- 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.
- 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.