kidney bean

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun An annual plant (Phaseolus vulgaris) in the pea family, cultivated in many forms for its edible pods and kidney-shaped seeds.
• noun A seed of this plant.
• noun A form of this plant bearing dark red seeds.
• noun A seed of this plant.

from The Century Dictionary.

• noun A leguminous plant of the genus Phascolus, especially Phaseolus vulgaris, the common twining kidneybean of the gardens, also called French bean and haricot (see cut under haricot): so called from the shape of the seeds.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A variety of common bean, Phaseolus vulgaris, with a dark-red skin.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large dark red bean; usually dried
• noun the common bean plant grown for the beans rather than the pods (especially a variety with large red kidney-shaped beans)