yam

Any of numerous chiefly tropical vines of the genus Dioscorea, many of which have edible tuberous roots.

The starchy root of any of these plants, used in the tropics as food.

A tuberous root of a plant of the genus Dioscorea, particularly if belonging to one of numerous species cultivated for their esculent roots; also, such a plant itself.

By transference, a variety of the sweet-potato.

Any plant of the order Dioscoreaceæ.

See Rajania.

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 Dioscorea sativa, but several others are cultivated.

Any one of several cultural varieties of the sweet potato.