Refers to the starchy tuber of plants in the genus Dioscorea, commonly eaten in tropical regions. In Japanese contexts, it may also refer to similar root vegetables like 山芋 (やまいも) or 長芋 (ながいも), but ヤム specifically denotes the tropical yam.
In Africa, many regions use yam as a staple food.
You can buy yams in the imported food section of the supermarket.
water yam; winged yam; purple yam
Borrowed from English 'yam', ultimately from Portuguese 'inhame' or a West African language.