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a salt of hydrofluoric acid; see hydrogen fluoridehydrogen fluoride,
chemical compound, HF, a colorless, fuming liquid or colorless gas that boils at 19.54°C;. It is miscible with water and is soluble in benzene, toluene, and concentrated sulfuric acid.
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. See also fluoridationfluoridation
, process of adding a fluoride to the water supply of a community to preserve the teeth of the inhabitants. Tooth enamel ordinarily contains small amounts of fluorides and when the amount is augmented through the intake of fluoridated water, especially during the
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; fluorinefluorine
, gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6°C;; b.p. −188.14°C;; density 1.696 grams per liter at STP; valence −1. Fluorine is a yellowish, poisonous, highly corrosive gas.
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a compound of fluorine with other elements. The fluorides of elements in Groups I and II of Mendeleev’s periodic system are solids with an ionic element—fluorine bond; the fluorides of most elements in Groups VI–VII are gases with a covalent element—fluorine bond. Compounds containing a C—F bond form numerous classes of fluorocarbons; the higher fluorides of many metals, such as U, V, Mo, W, and Re, are volatile substances. Fluorides occur in nature as constituents of minerals. In terms of chemical properties, the fluorides of halogens, inert gases, oxygen, nitrogen, and many other elements in higher oxidation states (for example, PtF5, CoF3, and AgF2) are oxidizing agents; the fluorides of arsenic, antimony, and boron are strong Lewis acids (seeACIDS AND BASES).

Fluorides can be obtained by the interaction of fluorine with elements, by the action of hydrogen fluoride on metals, and by other methods.

Hydrogen fluoride, oxyfluorides, and nitrogen fluorine compounds are widely used. The chlorine fluorides C1F3 and C1F5 are rocket-fuel oxidizing agents; C1F3 also serves as a fluorinating agent in the preparation of uranium hexafluoride, UF6, which is used in the atomic industry for the isotope separation of uranium. The volatile fluorides of metals are used in the application of metallic coatings. The fluorides of lithium, magnesium, calcium, strontium, barium, and other metals are used as raw materials in the manufacture of optical glass. (See alsoCRYOLITE.)


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(inorganic chemistry)
A salt of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state.


1. any salt of hydrofluoric acid, containing the fluoride ion, F--
2. any compound containing fluorine, such as methyl fluoride
References in periodicals archive ?
En fait, si l'on se refere a l'horloge du crime en Floride, publie par ce meme departement, on constate que durant l'annee 2012, il y a eu un meurtre toutes les 8 heures et 2 minutes, une agression sexuelle toutes les 52 minutes, un viol chaque heure et 42 minutes, un vol toutes les 22 minutes et une agression toutes les 9 minutes.
The Floride is the sort of car you might take one look at and decide to buy there and then on sheer impulse.
The Floride has one engine option, Renault's TCe 130 petrol engine.
19) Hampton's remarks on the story of Amadour and Floride in Marguerite de Navarre's Heptameron show the importance of reading the canons of literary genres like chivalric romance against the collective ideologies of particular social groups like the nobility--extending an argument he initially laid out in Writing from History concerning Cervantes's subversion of chivalric and historic exemplarity in Don Quixote.
De jeunes anglophones convertis en Floride reviennent au Quebec, apportent leur temoignage a leurs amis et provoquent un reveil a l'Eglise anglophone de Sainte-Foy, reveil qui atteint aussi la jeunesse quebecoise.
Our destination was Camping Nouvelle Floride in the heart of the busy resort of Marseillan-Plage.
Apparemment, les organisateurs de la tournee travaillent d'arrache-pied pour ameliorer le spectacle, dont nous avons vu l'avant-premiere en Floride la semaine derniere, parce que la performance du premier ministre, lors de sa rencontre avec Mickey, a ete decevante.
At Jackson's inaugural ball, Floride Calhoun, the wife of the Vice President, refused to acknowledge her presence.
Le senateur Biden et le senateur Graham, de Floride, qui l'accompagnait, ont ete pris d'un fou rire.
Another calculating appeal for pity is made by Floride in tale 10.
When the two are combined just before or after entering the mouth, a calcium fluoride precipitate forms only after the calcium and floride ions have a chance to infiltrate the tooth lesions and diffuse into plaque.

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