Fluorine Definition

flo͝orēn, -ĭn, flôr-
noun
A corrosive, toxic, greenish-yellow, gaseous chemical element, one of the halogens and the most reactive nonmetallic element, forming fluorides with almost all known elements: symbol, F; at. no. 9
Webster's New World

(chemistry, countable) A fluorine atom.

An octahedron of fluorines.
Wiktionary

(physics) The only stable isotope of fluorine, 199F; it has nine protons and ten neutrons.

Wiktionary
Synonyms:
  • atomic number 9
  • f
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Other Word Forms of Fluorine

Noun

Singular:
fluorine
Plural:
fluorines

Origin of Fluorine

  • From Latin fluor (“flow”) +‎ -ine

    From Wiktionary

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fluorine