flu ‧ o ‧ rine /ˈflʊəriːn $ ˈflʊr-/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: Modern Latin ; Origin: fluor ; ⇨ ↑ fluorescent ]
a chemical substance that is usually in the form of a poisonous pale yellow gas. It is a chemical ↑ element : symbol F