sweet potato

a plant, Ipomoea batatas, of the morning glory family, grown for its sweet, edible, tuberous roots.
the root itself, used as a vegetable.
Informal. ocarina.

1740–50, Americanism

cassava, sweet potato, yam.
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World English Dictionary
sweet potato
1.  a convolvulaceous twining plant, Ipomoea batatas, of tropical America, cultivated in the tropics for its edible fleshy yellow root
2.  the root of this plant

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Example sentences
Dessert offerings include sweet potato pie and banana pudding.
Serve with one and one-half cups rich brown sauce seasoned with tomato catsup
  and mashed sweet potato.
Ordered some corn dogs with regular and sweet potato fries.
Spicy red jalapeno jelly plays perfectly against sweet potato's sugary flavor
  in this easy side dish.
Images for sweet potato
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