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phosgene

noun
/ˈfɒzdʒiːn/
/ˈfɑːzdʒiːn/
[uncountable]
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  1. a poisonous gas that was used as a chemical weapon during the First World War光气,碳酰氯(第一次世界大战中用作化学武器)
    Word Originearly 19th cent.: 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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