mustard
mus.tard \'m*s-t*rd\ n [ME, fr. OF mostarde, fr. moust must, fr. L mustum] often attrib 1a: a pungent yellow powder of the seeds of a common mustard used as a cond iment or in medicine as a stimulant and diuretic, an emetic, or a counterirritant slang 1b: ZEST 2: any of several herbs (genus Brassica of the family Cruciferae, the mustard family) with lyrately lobed leaves, yellow flowers, and linear beaked pods 3a: MUSTARD GAS 3b: NITROGEN MUSTARD