Meaning

noun 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 sa

originEtymology tree Proto-Indo-European *ǵʰelh₃- Proto-Hellenic *kʰlōrós Ancient Greek χλωρός (khlōrós) Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ine English chlorine Coined by British chemist Humphry Davy in 1810 from Ancient Greek χλωρός (khlōrós, “pale green”) + -ine.

Etymology from Wiktionary, CC BY-SA 3.0