mustard oil
noun
oil expressed from the seed of mustard, used chiefly in making soap.
Origin of mustard oil
First recorded in 1840–50
Words nearby mustard oil
mustanger,
mustard,
mustard and cress,
mustard family,
mustard gas,
mustard oil,
mustard operation,
mustard plaster,
mustee,
mustelid,
musteline
British Dictionary definitions for mustard oil
mustard oil
noun
an oil that is obtained from mustard seeds and used in making soap