mustard plaster


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

mustard plaster

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

Mustard Plaster

 

a sheet of thick paper covered with a thin layer of defatted, dried, and powdered seeds of black or Indian mustard. Its active ingredients are the volatile mustard oil and the phytoncides released when water reacts with the enzyme myrosin, which is contained in mustard. Mustard plasters are used as irritants and revulsants in the treatment of bronchitis, lung inflammations, and muscular pains.