WordNet (r) 3.0 (2006):

white potato
    n 1: annual native to South America having underground stolons
         bearing edible starchy tubers; widely cultivated as a
         garden vegetable; vines are poisonous [syn: potato,
         white potato, white potato vine, Solanum tuberosum]
    2: an edible tuber native to South America; a staple food of
       Ireland [syn: potato, white potato, Irish potato,
       murphy, spud, tater]