mustard

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various Eurasian plants of the genus Brassica, especially B. nigra and B. juncea, which are cultivated for their pungent seeds and edible leaves.
2. n. A condiment made from the powdered seeds of certain of these plants.
3. n. A member of the mustard family.
4. n. A dark yellow to light olive brown.

Century Dictionary and Cyclopedia

1. n. A plant of the genus Brassica, formerly classed as Sinapis. The ordinary species are B. nigra, the black mustard; B. alba, the white mustard; and B. Sinapistrum, the wild mustard or charlock. The black and white mustards are largely cultivated in Europe and America for their seed (see def. 2). B. juncea, the Indian mustard, is used for the same purposes. The seed of the charlock is inferior, but yields a good burning-oil. All the species mentioned yield oils fit for lamps or for use as food, and, in Asia especially, the Indian and various other sorts are raised in large quantities for the sake of this product. The leaves of various mustards form excellent antiscorbutic salads. (SeeBrassica and charlock.) The “tree” which grew from “a grain of mustard seed,” mentioned in Luke xiii. 19, was probably the true mustard, Brassica nigra, which attains in Palestine a height of 10 or even 15 feet; aocording to Royle and others, the tree meant is Salvadora Persica, a small tree bearing minute berries with pungent seeds, which bear the same name in Arabic as mustard.
2. n. The seed of mustard crushed and sifted (and often adulterated), used in the form of paste as a condiment. or, in the form of poultice (sinapism), plaster, or prepared paper (mustard-paper), as a rubefacient.
3. n. One of numerous mustard-like plants, almost all cruciferous: used with a qualifying word. See names below
4. n. Clypeola Jonthlaspi.
5. n. Sometimes, erroneously, the pennycress

Wiktionary

1. n. A plant of certain species of the genus Brassica, or of related genera (especially Sinapis alba), in the family Brassicaceae, with yellow flowers, and linear seed pods.
2. n. Powder or paste made from seeds of the mustard plant, and used as a condiment or a spice.
3. n. Dark yellow colour, the colour of mustard.
4. n. The tomalley of a crab, which resembles the condiment.
5. adj. of a dark yellow colour.

GNU Webster's 1913

1. n. (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).
2. n. 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.

WordNet 3.0

1. n. any of several cruciferous plants of the genus Brassica
2. n. pungent powder or paste prepared from ground mustard seeds
3. n. leaves eaten as cooked greens