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Halogen
//ˈhæl.ə.d͡ʒən// noun
Definitions
Noun
- 1 Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.
- 2 any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions wordnet
- 3 A light fixture in which the filament is surrounded by an atmosphere of a halogen gas.
Etymology
From Ancient Greek ἅλς (háls, “salt" or "sea”) + γεν- (gen-), "to produce" (coined by Berzelius in 1842). By surface analysis, halo- (“salt”) + -gen (“forming”).
See also for "halogen"
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