yam bean
         n 1: twining plant of Amazon basin having large edible roots
               [syn: {yam bean}, {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 [syn: {yam bean}, {Pachyrhizus
            erosus}]

English Dictionary: yam bean	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
yam family n yams [syn: Dioscoreaceae, family Dioscoreaceae, {yam family}]