sorrel

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of several plants of the genus Rumex, having acid-flavored leaves sometimes used as salad greens, especially R. acetosella, a widely naturalized Eurasian species. Also called dock⁴.
2. n. Any of various plants of the genus Oxalis, having usually compound leaves with three leaflets.
3. n. A brownish orange to light brown.
4. n. A sorrel-colored horse or other animal.

Century Dictionary and Cyclopedia

1. n. One of several species of the genus Rumex, smaller plants than the docks of the same genus, having the leaves typically halberd-shaped, more or less succulent, and impregnated with oxalic acid. The common sorrel of the Old World is R. Acetosa, which has been much cultivated for culinary use. R. scutatus, the French sorrel, is, however, preferred for the purpose, being more succulent and less acid. Sorrel is much grown on the European continent, especially in France. It is used in salads and soups, but is more commonly dressed as a spinach. The use of sorrel iu America is slight but increasing. R. Acetosella, sometimes substituted for the foregoing, is the common sheep-sorrel. Both plants are refrigerant and diuretic antiscorbutics. See cut under Rumex.
2. n. A plant of the genus Oxalis, more properly called wood-sorrel (see cuts under Oxalis and obcordate): the name is also extended to other plants of different genera (see phrases)
3. n. The sheep-sorrel: probably from the red male inflorescence.
4. Of a yellowish-or reddish-brown color.
5. n. A color between a reddish and a yellowish brown.
6. n. An animal of a sorrel color; especially, a sorrel horse.
7. n. A buck of the third year. Compare sore, n., 2.

Wiktionary

1. n. A kind of plant with acidic leaves, especially Rumex acetosa (common sorrel), sometimes used as a salad vegetable.
2. n. A brown colour, with a tint of red.
3. adj. Of a brown colour, with a tint of red.

GNU Webster's 1913

1. adj. Of a yellowish or redish brown color.
2. n. A yellowish or redish brown color.
3. n. (Bot.) One of various plants having a sour juice; especially, a plant of the genus Rumex, as Rumex Acetosa, Rumex Acetosella, etc.

WordNet 3.0

1. n. any plant or flower of the genus Oxalis
2. n. a horse of a brownish orange to light brown color
3. adj. of a light brownish color
4. n. large sour-tasting arrowhead-shaped leaves used in salads and sauces
5. n. any of certain coarse weedy plants with long taproots, sometimes used as table greens or in folk medicine
6. n. East Indian sparsely prickly annual herb or perennial subshrub widely cultivated for its fleshy calyxes used in tarts and jelly and for its bast fiber