Definitions for halogenˈhæl ə dʒən, -ˌdʒɛn, ˈheɪ lə-
Random House Webster's College Dictionary
hal•o•genˈhæl ə dʒən, -ˌdʒɛn, ˈheɪ lə-(n.)
any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals.
Category: Chemistry
Origin of halogen:
1835–45
ha•log•e•noushæˈlɒdʒ ə nəs(adj.)
Princeton's WordNet
halogen(noun)
any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
Wiktionary
halogen(Noun)
Any element of group 7, i.e. fluorine, chlorine, bromine, iodine and astatine, which form a salt by direct union with a metal.
Origin: From ἅλς + -gen, referring to elements which produce a salt in union with a metal.
Webster Dictionary
Halogen(noun)
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
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