Question

what do you mean by a potato​

Answer 1

The potato is a root vegetable native to the Americas, a starchy tuber of the plant Solanum tuberosum, and the plant itself is a perennial in the nightshade family, Solanaceae. Wild potato species, originating in modern-day Peru, can be found throughout the Americas, from Canada to southern Chile. 

Answer 2

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sweet potato. 2a : an erect South American herb (Solanum tuberosum) of the nightshade family widely cultivated for its edible starchy tuber. b : the tuber of a potato. — called also Irish potato, spud, white potato