sweet potato

noun

1. A tropical perennial American vine, Ipomoea batatas, having a fleshy tuber.
2. The tuber of this plant cooked as a vegetable.

   “The sweet potato is the article referred to as potato by Shakespeare and other English writers, previous to the middle of the seventeenth century.”

   “I go back to the kitchen and find a knife, still smeared with sweet potato and bits of pheasant meat.”

3. An ocarina.