Definition of phosgene in English:

phosgene

Line breaks: phos|gene
Pronunciation: /ˈfɒzdʒiːn
 
/

noun

[mass noun] Chemistry
  • A colourless poisonous gas made by the reaction of chlorine and carbon dioxide. It was used as a poison gas, notably in the First World War.
    • Alternative name: carbonyl chloride; chemical formula: COCl2
    More example sentences
    • New agents, notably phosgene (an asphyxiating agent) and mustard (a blister agent called a vesicant), had been developed and used.
    • The primary gaseous agents used were chlorine, phosgene, a combination of the two, and mustard gas.
    • However, its immediate precursor compound, thiodiglycol, is used industrially, although in quantities that don't come anywhere near chlorine or phosgene.

Origin

early 19th century: from Greek phōs 'light' + -gen, with reference to its original production by the action of sunlight on chlorine and carbon monoxide.

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