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Noun: yam bean  yam been
  1. Twining plant of Amazon basin having large edible roots
    - potato bean, Pachyrhizus tuberosus
  2. Central American twining plant with edible roots and pods; large tubers are eaten raw or cooked especially when young and young pods must be thoroughly cooked; pods and seeds also yield rotenone and oils
    - Pachyrhizus erosus

Derived forms: yam beans

Type of: vine

Part of: genus Pachyrhizus, Pachyrhizus

Encyclopedia: Yam bean