halogen

/หˆheษช.lษ™.dอกส’ษ™n/

IPA: /HH AE1 L AH0 JH AH0 N/

noun
  1. 1

    Any element of group 17, i.e. fluorine, chlorine, bromine, iodine and astatine, which form a salt by direct union with a metal.

  2. 2

    A light fixture in which the filament is surrounded by an atmosphere of a halogen gas,

Source: https://en.wiktionary.org/wiki/halogen