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halogen

halogen

2 definitions found for halogen

From The Collaborative International Dictionary of English v.0.48 :

  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]

From WordNet (r) 3.0 (2006) :

  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