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mustard oil Definition
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mustard oil
noun(mustard oil)a colorless to pale yellow pungent irritating essential oil that is obtained by distillation from the seeds usually of black mustard after expression of the fatty oil and maceration with water, that consists largely of allyl isothiocyanate, and that is used especially in liniments and medicinal plasters
mustard oil
noun(mustard oil)allyl isothiocyanate
mustard oil
noun(mustard oil)an isothiocyanate ester
mustard oil
noun(mustard oil)a colorless pungent irritating liquid ester C4H5NS that is the chief constituent of mustard oil used in medicine and is used as a flavoring agent and as a medical counterirritant —called also allyl mustard oil