halogen [ hal- uh-j uh n, -jen, hey-l uh- ] SHOW IPA / ˈhæl ə dʒən, -ˌdʒɛn, ˈheɪ lə- / PHONETIC RESPELLING noun . Chemistry any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals. Nearby words halo-
halolike Origin of halogen
First recorded in
-gen Related forms ha·log·e·nous , [ha- loj- uh-n uh s] /hæˈlɒdʒ ə nəs/ adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for halogen British Dictionary definitions for halogen noun any of the chemical elements fluorine, chlorine, bromine, iodine, and astatine. They are all monovalent and readily form negative ions Derived Forms halogenoid, adjective halogenous ( həˈlɒdʒɪnəs), adjective Word Origin for halogen
C19: from Swedish; see
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Medicine definitions for halogen n. Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine.
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Science definitions for halogen Any of a group of five nonmetallic elements with similar properties. The halogens are fluorine, chlorine, bromine, iodine, and astatine. Because they are missing an electron from their outermost shell, they react readily with most metals to form salts. See Periodic Table.
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