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Crossword clue: a plaster containing powdered black mustard; applied to the skin as a counterirritant or rubefacient

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sinapism 8 letters wn-def

a plaster containing powdered black mustard; applied to the skin as a counterirritant or rubefacient

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Related clues

A plaster or poultice composed principally of powdered mustard seed, or containing the volatile oil of mustard seed. It is a powerful irritant.