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Crossword clue: a colorless poisonous gas that smells like new-mown hay; used in chemical warfare

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Possible answers

phosgene 8 letters wn-def

a colorless poisonous gas that smells like new-mown hay; used in chemical warfare

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Related clues

Producing, or produced by, the action of light; -- formerly used specifically to designate a gas now called carbonyl chloride. See Carbonyl.