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 ?
Round by Round by Florine Dotson Evans Publication Date: September 2, 2014 Paperback: $9.
102) Finally, during the year that Florine executed her double portrait, Duchamp wrote Ettie and Carrie from Rouen, "Needless to say, in addition to all this I played a lot of chess in Brussels and am ranked among the good players in Belgium.
Rosalie that she did not "call Florine from her work" (363)
Hamilton, who is also know as or Florine Palmer, was indicted to appear at the High Court in Aberdeen in September 2002 - but failed to show up and a warrant was issued for her arrest.
The happiness of the devoted couple, Florine and Lucius, was complete when after ten long years their daughter Gillette was born, gratifying their most ardent wishes.
Four Saints' lack of plot broke all the rules of opera, the use of American hymn tunes daunted the sophisticates, the casting was controversial--Thomson and Stein insisted on an ensemble made up entirely of African-Americans, operating on the theory that they were able to project Stein's libretto with more musicality--and Florine Stettheimer's cellophane sets have earned a special place in art history.
Coach Jim Criner has also traded offensive lineman Ron Florine for Rhein Fire linebacker Alan Campos.
Silk Flowers" FLORINE REED, 75; ELDA WACHHOLZ, 87 -- Innsbruck Healthcare Center, New Brighton, Minnesota.
Other artists include Maria Antonieta Proffer of Grand Blanc with painted artwork; wood artwork by Thomas Mogford of Fenton, William Cox of Flushing and Robert Florine of Swartz Creek.
Her repertoire with the National Opera Ballet included leading roles in many of the great classics: Gamzatti in "La Bayadere;" Kitri, the Queen of the Driads and Mercedes in "Don Quixote;" Giselle and Myrta in "Giselle;" Princess Aurora and Princess Florine in "The Sleeping Beauty;" Odette-Odile in "Swan Lake;" the Sugar Plum Fairy in "The Nutcracker;" and the title roles in "Cinderella" and "Paquita.
She can summon companions as unlikely as Florine Stettheimer and Yves Tanguy, or George Grosz and Elizabeth Peyton, in a single picture.
Also present were volunteers Raju Kalumpuram, Zubair Kannur, Arun Govind, Basheer Ambalayi, Nasser Mancheri, K G Devrajan, K Satheendaran, Pavithran Neeleshwaram, Florine Mathias, Mallita Daise, Meera Kamath and ICRF members.