Advertisement

Advertisement

fluorine

[ floor-een, -in, flawr-, flohr- ]

noun

, Chemistry.
  1. the most reactive nonmetallic element, a pale-yellow, corrosive, toxic gas that occurs combined, especially in fluorite, cryolite, phosphate rock, and other minerals. : F; : 18.9984; : 9.


fluorine

/ ˈflʊəriːn; ˈflʊərɪn /

noun

  1. a toxic pungent pale yellow gas of the halogen group that is the most electronegative and reactive of all the elements, occurring principally in fluorspar and cryolite: used in the production of uranium, fluorocarbons, and other chemicals. Symbol: F; atomic no: 9; atomic wt: 18.9984032; valency: 1; density: 1.696 kg/m³; relative density: 1.108; freezing pt: –219.62°C; boiling pt: –188.13°C
“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


fluorine

/ flrēn′ /

  1. A pale-yellow, poisonous, gaseous element of the halogen group. It is highly corrosive and is used to separate certain isotopes of uranium and to make refrigerants and high-temperature plastics. It is also added in fluoride form to the water supply to prevent tooth decay. Atomic number 9; atomic weight 18.9984; melting point −223°C; boiling point −188.14°C; specific gravity of liquid 1.108 (at boiling point); valence 1.


Discover More

Word History and Origins

Origin of fluorine1

First recorded in 1805–15; fluor(ic) + -ine 1
Discover More

Compare Meanings

How does fluorine compare to similar and commonly confused words? Explore the most common comparisons:

Discover More

Example Sentences

Fifty-two percent of those products contained a high fluorine level, suggesting it contained at least one PFAS.

Adding fluorine to fentanyl showed increased opioid activity in the more acidic conditions of injured tissue compared to healthy tissue.

Over the last three years, researchers tested 231 cosmetics products in North America for fluorine, an indicator of per- and polyfluoroalkyl substances, or PFAS.

Among over 200 tested beauty products, about half contained high levels of fluorine — a marker for potentially harmful PFAS compounds.

Long-lasting or waterproof products were especially likely to contain lots of fluorine.

Calcium also occurs, combined with fluorine, in the mineral fluor (CaF2).

Fluorine is frequently met with as calcium fluoride or fluor-spar (CaF2).

If the substance contained fluorine, the characters will be found permanently etched on the glass.

The increase in weight multiplied by 0.655 gives the weight of fluorine.

The loss in weight gives that of the silicon fluoride (SiF4), which, multiplied by 0.7307, gives the weight of fluorine.

Advertisement

Advertisement

Advertisement

Advertisement


fluorinatefluorine dating