| mustard plaster | (n) a plaster containing powdered black mustard; applied to the skin as a counterirritant or rubefacient, Syn. sinapism |
| Sinapism | n. [ L. sinapismus, Gr. &unr_;&unr_;&unr_;&unr_;, the use of a mustard blister, fr. &unr_;&unr_;&unr_; to apply a mustard blister, fr. &unr_;&unr_;&unr_;&unr_; mustard. ] (Med.) A plaster or poultice composed principally of powdered mustard seed, or containing the volatile oil of mustard seed. It is a powerful irritant. [ 1913 Webster ] |