Halogen
Pronunciation : Hal"o*gen
Part of Speech : n.
Etymology : [Gr. "a`ls, "alo`s, salt + -gen: cf. F. halog?ne.] (Chem.)
Definition : Defn: An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine.
Source : Webster's Unabridged Dictionary, 1913