mustard

(mus’tard) [L. sin a’ pis]. A plant of the enus Bras’sic a. The Is of Bras’sic a ni’gra lack m.) and of B. al’ba (white m.) contain a@ pungent, irritating, volatile oil, which consists chiefly of allyl thiocyanate, a fixed oil, the ferment myrosin, and the glucosids sinalbin (in white mustard) and sinigrin (in black mustard). Mustard is a counterirritant, stimulant, and revulsant, and is used in internal pains and congestions, as gastric colic, abdominal pains, colic, neuralgia, rheumatism, headache, vomiting, and cerebral congestion: it is also employed as a condiment and as an emetic. Dose, as an emetic, 1-2 dr. (4-8 gm.); of volatile oil of black mustard, 4-4 min. (0.008-0.0165 c.c.).