fluorine
noun/ˈflɔːriːn/, /ˈflʊəriːn/
/ˈflɔːriːn/, /ˈflʊriːn/
[uncountable] (symbol F)
- a chemical element. Fluorine is a poisonous pale yellow gas and is very reactive.Word Originearly 19th cent.: from fluor ‘a flow, a mineral used as a flux, fluorspar’ (from Latin fluor, from fluere ‘to flow’) + -ine.
Check pronunciation:
fluorine