Hypertext Webster Gateway: "sinapism"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Sinapism \Sin"a*pism\, n. [L. sinapismus, Gr. ????, the use of a
mustard blister, fr. ??? to apply a mustard blister, fr. ????
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.
From WordNet (r) 1.7 (wn)
sinapism
n : a plaster containing powdered black mustard; applied to the
skin as a counterirritant or rubefacient [syn: {mustard
plaster}]
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