Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A pale-yellow, highly corrosive, poisonous, gaseous halogen element, the most electronegative and most reactive of all the elements, existing as a diatomic gas (F2) and used in a wide variety of industrially important compounds. Atomic number 9; atomic weight 18.9984; melting point −219.67°C; boiling point −188.12°C; specific gravity of liquid 1.50 (at boiling point); valence 1. cross-reference: Periodic Table.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) A non-metallic, gaseous element of atomic number 9, strongly acid or negative, and associated with chlorine, bromine, and iodine, in the halogen group of which it is the first member. It always occurs combined, is very active chemically, and possesses such an avidity for most elements, and silicon especially, that it can neither be prepared nor kept in glass vessels, but may be contained in lead vessels. If set free it immediately attacks a containing glass vessel, so that it was not isolated until 1886. It is a pungent, corrosive, colorless gas. Symbol F. Atomic weight 19.00.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun uncountable The chemical element (symbol F) with an atomic number of 9.
  • noun chemistry, countable A fluorine atom.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin fluor ("flow") +‎ -ine

Examples

  • "The new mineral does not contain fluorine and is white rather than green, but in all other respects the chemistry matches that for the rock containing kryptonite," Stanley said.

    Weird ‘Kryptonite’ Found in Serbia | Impact Lab

  • It's a corrosive gas, like fluorine, which is used to etch glass.

    Jurassic Park

  • At a red heat platinic fluoride decomposes into metallic platinum and fluorine, which is evolved in the free state.

    Scientific American Supplement, No. 832, December 12, 1891

  • This is a compound of fluorine, which is actually a chemical byproduct of aluminum, steel, cement, phosphate, and other assorted ingredients.

    Signs of the Times

  • To divert to the outer planets for a moment, Titan, one might note (together with giant bodies like Jupiter and Saturn to boot), is in a wholly unoxygenating (or “reducing”) environment (no oxygen, nor any other reactive gas such as fluorine or chlorine anywhere around).

    The Democratic Party's email attacking Jerome Corsi (author of the #1 selling anti-Obama book).

  • While most of the requirements for keeping people alive are common (mainly hydrogen, carbon, oxygen, nitrogen, calcium, and phosphorus) and are fairly easy to handle, there is a long list of trace elements that human body requires, some of which are not easy to handle (such as fluorine) and even harder to get into forms that the human body can assimilate.

    2006 December « Hyperpat’s HyperDay

  • While most of the requirements for keeping people alive are common (mainly hydrogen, carbon, oxygen, nitrogen, calcium, and phosphorus) and are fairly easy to handle, there is a long list of trace elements that human body requires, some of which are not easy to handle (such as fluorine) and even harder to get into forms that the human body can assimilate.

    A Starship Today? « Hyperpat’s HyperDay

  • Generally, indeed, it may be maintained that right is of a nature analogous to that of certain chemical substances, which cannot be exhibited in a pure and isolated condition, but at the most only with a small admixture of some other substance, which serves as a vehicle for them, or gives them the necessary consistency; such as fluorine, or even alcohol, or prussic acid.

    On Human Nature

  • Hekla, Iceland: 14 May 1970; "Local groundwater is measuring high amounts of fluorine, which is toxic to sheep and horses.

    Volcanic Ash -- Effects on Water Supply and Mitigation Strategies

  • Hekla, Iceland: 14 May 1970; "Local groundwater is measuring high amounts of fluorine, which is toxic to sheep and horses.

    Volcanic Ash -- Effects on Water Supply and Mitigation Strategies

Comments

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  • F.

    December 16, 2007