chlorine
noun /ˈklɔːriːn/
/ˈklɔːriːn/
[uncountable] (symbol Cl)
- a chemical element. Chlorine is a poisonous green gas with a strong smell. It is often used in swimming pools to keep the water clean.Topics Sports: water sportsc2, Physics and chemistryc2Word Originearly 19th cent.: named by Sir Humphrey Davy, from Greek khlōros ‘green’ + -ine.