| halogen | <chemistry> An electronegative 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. Origin: Gr. "als, "alos, salt + -gen: cf. F. Halogene. Source: Websters Dictionary (01 Mar 1998) |
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| halogen acne | An acneform eruption caused by bromides or iodides. (05 Mar 2000) |
| halogenation | Incorporation of one or more halogen atoms into a molecule. (05 Mar 2000) |
| halogenoderma | Dermatosis caused by ingestion or injection of halogens, most notably bromides and iodides. Origin: halogen + G. Derma, skin (05 Mar 2000) |
| halogens | A family of nonmetallic, generally electronegative, elements of group viib of the periodic table. They are all multivalent and have oxidation numbers of -1 (the most common), 1, 3, 5, and 7. (12 Dec 1998) |
| Halogeton | A genus of plants (family Chenopodiaceae) on range lands in the western U.S. And other arid regions of the world; it causes poisoning in cattle and sheep because of the presence of soluble oxalates. (05 Mar 2000) |