HALOGEN
\hˈaləd͡ʒən], \hˈalədʒən], \h_ˈa_l_ə_dʒ_ə_n]\
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One of the chlorine group (bromine, chlorine, fluorine, iodine) of metalloids, all univalent elements; they form monobasic acids with hydrogen, and their hydroxides (fluorine forms none) are also monobasic acids.
By Stedman, Thomas Lathrop
By William R. Warner
By Nuttall, P.Austin.
By Willam Alexander Newman Dorland
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