Dictionary
mustard gas
noun
: a poison gas used as a weapon in a war
Full Definition of MUSTARD GAS
: an irritant vesicant oily liquid C4H8Cl2S used especially as a chemical weapon
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First Known Use of MUSTARD GAS
1917
Medical Dictionary
mustard gas
noun
Medical Definition of MUSTARD GAS
: an irritant oily liquid C4H8Cl2S used especially as a chemical weapon that causes blistering, attacks the eyes and lungs, and is a systemic poison—called also dichlorethyl sulfide, sulfur mustard
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