Mus·tard n.
1. Bot. The name of several cruciferous plants of the genus Brassica (formerly Sinapis), as white mustard (Brassica alba), black mustard (Brassica Nigra), wild mustard or charlock (Brassica Sinapistrum).
Note: ☞ There are also many herbs of the same family which are called mustard, and have more or less of the flavor of the true mustard; as, bowyer's mustard (Lepidium ruderale); hedge mustard (Sisymbrium officinale); Mithridate mustard (Thlaspi arvense); tower mustard (Arabis perfoliata); treacle mustard (Erysimum cheiranthoides).
2. A powder or a paste made from the seeds of black or white mustard, used as a condiment and a rubefacient. Taken internally it is stimulant and diuretic, and in large doses is emetic.
Mustard oil Chem., a substance obtained from mustard, as a transparent, volatile and intensely pungent oil. The name is also extended to a number of analogous compounds produced either naturally or artificially.
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Trea·cle n.
1. Old Med. A remedy against poison. See Theriac, 1.
We kill the viper, and make treacle of him. --Jer. Taylor.
2. A sovereign remedy; a cure. [Obs.]
Christ which is to every harm treacle. --Chaucer.
3. Molasses; sometimes, specifically, the molasses which drains from the sugar-refining molds, and which is also called sugarhouse molasses.
Note: ☞ In the United States molasses is the common name; in England, treacle.
4. A saccharine fluid, consisting of the inspissated juices or decoctions of certain vegetables, as the sap of the birch, sycamore, and the like.
Treacle mustard Bot., a name given to several species of the cruciferous genus Erysimum, especially the Erysimum cheiranthoides, which was formerly used as an ingredient in Venice treacle, or theriac.
Treacle water, a compound cordial prepared in different ways from a variety of ingredients, as hartshorn, roots of various plants, flowers, juices of plants, wines, etc., distilled or digested with Venice treacle. It was formerly regarded as a medicine of great virtue. --Nares.
Venice treacle. Old Med. Same as Theriac, 1.
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Erysimum cheiranthoides
n : slender yellow-flowered European mustard often troublesome
as a weed; formerly used as an anthelmintic [syn: wormseed
mustard]