Dictionary

mustard gas

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

First Known Use of MUSTARD GAS

1917

mustard gas

noun    (Medical Dictionary)

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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