1. (noun)chlorine, Cl, atomic number 17 a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water) Synonyms: atomic number 17, centiliter, chlorine, centilitre
Synonyms and Antonyms of chlorine 
