halogen.
Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.
Meaning & usage
Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.
A light fixture in which the filament is surrounded by an atmosphere of a halogen gas.
Where this word comes from
From Ancient Greek ἅλς (háls, “salt" or "sea”) + γεν- (gen-), "to produce" (coined by Berzelius in 1842). By surface analysis, halo- (“salt”) + -gen (“forming”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.