sweet-potato

sweet potato

noun
1.
a plant, Ipomoea batatas, of the morning glory family, grown for its sweet, edible, tuberous roots.
2.
the root itself, used as a vegetable.
3.
Informal. ocarina.

Origin:
1740–50, Americanism

cassava, sweet potato, yam.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sweet potato
 
n
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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