Definition for MUS'TARD

MUS'TARD, n. [It. mostarda; Fr. moutarde; Arm. mustard; Port. mostarda; Sp. mostaza; W. mwstarz; mws, that has a strong scent, and tarz, a breaking out.]

A plant of the genus Sinapis, and its seed, which has a pungent taste and is a powerful irritant. It is used externally in cataplasms, and internally as a diuretic and irritant. Encyc.

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