Sinapis

(si-na'pis.) (Bot.) The Mustard, a gen. of plants, O. Bra icaceæ, closely allied to Bra ica. The Black Mustard, S. nigra, yields the greatest portion of the condiment so generally used in this country. The seeds are of a reddish-brown color. Mixed with those of S. alba (which are larger, and of a yellow color externally) they are crushed between rollers, and subsequently pounded and sifted twice or oftener. From the residue left on the sieve a fixed oil is obtained by pre ure. [s. 828]