Definition of mustard gas noun from the Oxford Advanced Learner's Dictionary


mustard gas

BrE BrE//ˈmʌstəd ɡæs//
; NAmE NAmE//ˈmʌstərd ɡæs//
[uncountable] Weapons
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a poisonous gas that burns the skin, used in chemical weapons, for example during the First World War See related entries: Weapons
See the Oxford Advanced American Dictionary entry: mustard gas