Yam

A large, esculent, farinaceous tuber of various climbing plants of the genus Dioscorea; also, the plants themselves. Mostly natives of warm climates. The plants have netted-veined, petioled leaves, and pods with three broad wings. The commonest species is D. sativa, but several others are cultivated.

any of a number of tropical vines of the genus Dioscorea many having edible tuberous roots

edible tuber of any of several yams