kidney bean

1. An annual plant (Phaseolus vulgaris) cultivated in many forms for its edible pods and seeds.
2. The pod or seed of this plant.

A firm, medium-size bean with a dark red skin and cream-colored flesh. Its full-bodied flavor makes it particularly popular for dishes like chili con carne and red beans and rice. On the downside, it's an enthusiastic producer of flatulence. Unless you live in an area that grows kidney beans, you won't find them fresh but will have to settle for the dried or canned forms. White kidney beans-referred to as cannellini beans-aren't favored with the robust flavor of their red cousins, and are only available dried or canned. The tiny, tender French kidney beans are called flageolets and may be purchased dried, canned and, sometimes, frozen. See also beans.

phaseolus vulgaris.

The noun has 2 meanings:

Meaning #1: the common bean plant grown for the beans rather than the pods (especially a variety with large red kidney-shaped beans)
  Synonyms: frijol, frijole

Meaning #2: large dark red bean; usually dried