fluor·ide

[floor-ahyd, flawr-, flohr-]
noun Chemistry.
1.
a salt of hydrofluoric acid consisting of two elements, one of which is fluorine, as sodium fluoride, NaF.
2.
a compound containing fluorine, as methyl fluoride, CH 3 F.

Origin:
1820–30; fluor- + -ide

fluorescent, fluoridation, fluoride.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To fluoride
Collins
World English Dictionary
fluoride (ˈflʊəˌraɪd) [Click for IPA pronunciation guide]
 
n
1.  any salt of hydrofluoric acid, containing the fluoride ion, F--
2.  any compound containing fluorine, such as methyl fluoride

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Fluoride is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
a chattering or flighty, light-headed person.
Etymonline
Word Origin & History

fluoride
1826, "binary compound of fluorine with another element," from the same source as fluorine (q.v.). Fluoridation, in reference to adding traces of fluorine to drinking water as a public health policy, dates from 1949.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

fluoride fluor·ide (fl&oobreve;r'īd', flôr'-)
n.

  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.
Cite This Source
American Heritage
Science Dictionary
fluoride   (flr'īd')  Pronunciation Key 
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.
Cite This Source
American Heritage
Cultural Dictionary
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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Example sentences
Thorium-fluoride reactors can operate at atmospheric temperature.
Describes the dietary reference intakes for specific nutrients known to be
  beneficial to health, including fluoride.
Hydrogen fluoride is a well known, potent greenhouse gas, and is a side effect
  of exposing uranium hexafluoride to air.
Remineralization is in turn influenced by the presence of salivary minerals,
  available fluoride ion and salivary flow rate.
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT