yam bean   (TTS Sound)

The noun yam bean has 2 senses

• yam bean, potato bean, Pachyrhizus tuberosus -- (twining plant of Amazon basin having large edible roots)


• yam bean, Pachyrhizus erosus -- (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)