fluorine

== English == === Etymology === From Latin fluor (“flow”) +‎ -ine. Coined by British chemist Humphry Davy in 1813. === Pronunciation === (General American) enPR: flo͝or'ēn′, -ĭn, IPA(key): /ˈflʊ(ə)ɹˌin, -ɪn/; enPR: flôr'ēn′, -ĭn, IPA(key): /ˈfloɹˌin, -ɪn/ === Noun === fluorine (countable and uncountable, plural fluorines) (uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals. Hypernym: halogen (chemistry, countable) A single atom of this element. ==== Synonyms ==== phthor (obsolete) ==== Hypernyms ==== element halogen ==== Derived terms ==== ==== Related terms ==== ==== Translations ==== === See also === fluorene === References === Fluorine on the British Royal Society of Chemistry's online periodic table == French == === Pronunciation === IPA(key): /fly.ɔ.ʁin/ === Noun === fluorine f (plural fluorines) fluorite === Further reading === “fluorine”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012 == Indonesian == === Noun === fluorine (plural fluorine-fluorine) fluorin