Definition of chlorine noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈklɔːriːn//
; NAmE NAmE//ˈklɔːriːn//
[uncountable] (symbol Cl) Swimming
jump to other results
a chemical element. Chlorine is a poisonous greenish gas with a strong smell. It is often used in swimming pools to keep the water clean. See related entries: Swimming Word Originearly 19th cent.: named by Sir Humphrey Davy, from Greek khlōros ‘green’ + -ine.
See the Oxford Advanced American Dictionary entry: chlorine