fluorine

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fluorine

 (F) [floor´ēn]
a chemical element, atomic number 9, atomic weight 18.998. (See Appendix 6.)
fluorine 18 a radioactive isotope of fluorine, atomic mass 18, having a half-life of 1.8925 hours; it has been used as a tracer in positron emission tomography.

fluor·ine (F),

(flōr'ēn), Avoid the mispronunciation fluorīne.
A gaseous chemical element, atomic no. 9, atomic wt. 18.9984032; 18F (half-life of 1.83 h) is used as a diagnostic aid in various tissue scans.
[L. fluere, flow]

fluorine

/flu·o·rine/ (F) (floor´ēn) a chemical element, at. no. 9.

fluorine (F)

[floo͡r′ēn, flo̅o̅′ərēn]
Etymology: L, fluere, to flow
an element of the halogen family and the most reactive of the nonmetals. Its atomic number is 9, and its atomic mass is 19.00. It occurs in nature only as a component of substances such as fluorspar, cryolite, and phosphate rocks. It can be prepared by the electrolytic decomposition of hydrogen fluoride and in its pure form is a pale yellow toxic gas 1.6 times heavier than air. It is also a component of very stable fluorocarbons used in the manufacture of resins and plastics. As a component of fluorides, it is widely distributed throughout the soils of the earth, enters plants, is ingested by humans, and is absorbed from the GI tract. Fluorides in the atmosphere and industrial dust are absorbed by the lungs and the skin. Relatively soluble compounds, such as sodium fluoride, are almost completely absorbed by humans. The relatively insoluble compounds, such as cryolite, are poorly absorbed. Small amounts of sodium fluoride are added to the water supply of many communities to harden tooth enamel and decrease dental caries. Excessive amounts of fluoride can mottle tooth enamel and cause osteosclerosis. Acute fluoride poisoning and death can result from the accidental ingestion of insecticides and rodenticides containing fluoride salts.

fluor·ine

(F) (flōr-ēn')
A gaseous chemical element; atomic no. 9, atomic weight 18.9984032; 18F (half-life of 1.83 hours) is used as a diagnostic aid in various tissue scans.

fluor·ine

(F) (flōr-ēn')
A gaseous chemical element used as a diagnostic aid in various tissue scans.

fluorine

(flŏŏr´ēn),
n an element of the halogen family and the most reactive of the nonmetals. Its atomic number is 9, and its atomic weight is 19. Small amounts of sodium fluoride added to the public water supply will reduce the incidence of dental caries, particularly among children. Excessive amounts of fluoride can mottle tooth enamel and cause osteosclerosis. Acute fluoride poisoning can cause death.

fluorine

a chemical element, atomic number 9, atomic weight 18.998, symbol F. See Table 6.

fluorine poisoning
References in periodicals archive ?
Francis Naumann has explained that Duchamp was probably introduced to the Stettheimer sisters, Florine, Carrie, and Ettie, in the fall of 1916 by the journalist Carl Van Vechten, a regular member of the Arensberg circle.
Florine Koning, De Pasar Malam van Tong Tong, een Indische onderneming.
the dainty food brought by the visitors "saved Florine and [her]
6-acre Arkansas Precast site was bought for $20,000 in February 1970 from Robert and Florine Campbell, and the 2.
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McCurdy Professor of Law, Case Western Reserve University School of Law; George Lefcoe, Ervin and Florine Yoder Chair in Real Estate Law, University of Southern California Gould School of Law; Robert A.
Out From Las Vegas: Adventures A Day Away by travel writer Florine Lawlor is an intriguing, informative, and "user friendly" guide to a wealth of interesting landmarks, getaways and scenic geographical significants within a day from Las Vegas, Nevada.
Jamaican Florine Hamilton, 30, is wanted on a High Court warrant following the recovery of pounds 65,000 of crack in Aberdeen in September 2001.
One day a young visitor, Florine Egroizard, had tearfully recited a moving narrative entreating Canterel to use his illustrious science to save her husband, who had been driven insane as a result of a sudden calamity, and who for two years had exhausted the greatest specialists.
With: David Brewer, Yvon Chouinard, Lynn Hill, Jim Bridwell, Hans Florine, Royal Robbins.
Part 1 ends with sketches of, besides the talented Jacquet de la Guerre (1666-1729), Florine Dezede (1765-1792), Lucile Gretry (1772-1790), Caroline Wuiet (1766-1835), Henriette Beaumesnil (1748- 1813), Constance de Salm (1767-1845), Jeanne-Hippolyte Devismes (1765-1834?
I've never forgotten the answer of an aging ballerina on a dance panel: Florine is a bird, the woman said, she's listening and wary because she hears Puss in Boots, a cat, in the wings.