yam

n 1: edible tuber of any of several yams

2: any of a number of tropical vines of the genus Dioscorea

many having edible tuberous roots [syn: {yam plant}]

3: sweet potato with deep orange flesh that remains moist when

baked

4: edible tuberous root of various yam plants of the genus

Dioscorea grown in the tropics world-wide for food