Yam

имя существительное [ботаника] 1) ямс 2) [американский вариант английского языка, диалектное] батат, сладкий картофель Синоним(ы): sweet potato

Большой англо-русский словарь

Yam

noun Etymology: earlier iname, from Portuguese inhame and Spanish ñame, of African origin; akin to Fulani nyami to eat 1. the edible starchy tuberous root of various plants (genus Dioscorea of the family Dioscoreaceae) used as a staple food in tropical areas; also a plant producing yams 2. a moist-fleshed and usually orange-fleshed sweet potato

Merriam-Webster's Collegiate Dictionary