英文字典中文字典51ZiDian.com
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halogen 音标拼音: [h'ælədʒən] n. 卤素 卤素 halogen n 1: any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions Halogen \Hal"o*gen\ (h[a^]l"[-o]*j[e^]n), n. [Gr. "a`ls, "alo`s, salt -gen: cf. F. halog[`e]ne.] (Chem.) An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, fluorine, bromine, and iodine; sometimes, also cyanogen. See {Chlorine family}, under {Chlorine}. [1913 Webster]
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