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''halogen'' ▫ᴱᴺ｜Definition｜1st｜20260124004559-00-⌔

halogen - Wiktionary, the free dictionary

English

Noun

halogen (plural halogens)

• (chemistry) Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.
  • ✤ Hypernyms: nonmetal < element < substance, material
  • ✤ Coordinate terms: chalcogen, pnictogen, metalloid, metal
  • ✤ Plant 12 also stored super sacks of bromochloro-5,5-dimethylimidazolidine-2,4-dione (BCDMH), which is a granular solid oxidizer with a halogen odor that, in addition to chlorine gas and hydrogen chloride, can also release bromine gas and hydrogen bromide upon decomposition.¹
• 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).² By surface analysis, halo- (“salt”) +‎ -gen (“forming”).

Pronunciation

• enPR: hălʹə-jən, hāʹlə-jən
• IPA: /ˈhæl.ə.d͡ʒən/, /ˈheɪ.lə.d͡ʒən/
• Audio (Southern England): 🔊

Printed 2026-06-28.

(echo:: @ ⌗)

Footnotes

1. 2024 November, “Chemical Decomposition, Fire, and Toxic Gas Release at Bio-Lab, Inc.”, in U.S. Chemical Safety and Hazard Investigation Board ‎${}^{[1]}$, archived from the original on 1 March 2025, page 2: ↩

2. Douglas Harper (2001–2026), “halogen”, in Online Etymology Dictionary. ↩

Link to original

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