[sin-uh-piz-uh
m] 
| mustard plaster n. A medicinal plaster made with a pastelike mixture of powdered black mustard, flour, and water, used especially as a counterirritant. Also called sinapism. |
| sin·a·pism (sĭn'ə-pĭz'əm) n. See mustard plaster. [French sinapisme, from Late Latin sināpismus, from Greek sināpismos, use of a mustard plaster, from sināpizein, to apply a mustard plaster, from sināpi, mustard, perhaps variant of earlier nāpu.] |