cocoyam noun2 •New cocoyam: Xanthosoma, particularly Xanthosoma sagittifolium, or the edible root of that plant; malanga.Ampesi, intensely flavored stews or soups, are eaten with fufu, a firm, starchy dumpling made from plantains or cocoyam. — 2007 •Old cocoyam: Colocasia esculenta; taro. formscocoyams