mustard plaster

noun

1. a black mixture of mustard and rubber placed on a cloth and applied to the skin as a counterirritant.

mustard plaster

noun

1. med a mixture of powdered black mustard seeds and an adhesive agent applied to the skin for its relaxing, stimulating, or counterirritant effects

Word History and Origins

Origin of mustard plaster¹

First recorded in 1855–60