What is "chloro-"

Chloro- \Chlo"ro-\ (Chem.) A prefix denoting that chlorine is an ingredient in the substance named.

before vowels chlor-, word-forming element used in chemistry, usually indicating the presence of chlorine in a compound, but sometimes "green," from Latinized comb. form of Greek khloros (see Chloe); also compare chlorine.

pre. 1 green in color. 2 (context chemistry English) Containing chlorine.