Sweet potato Meaning, Definition & Usage

  1. noun pantropical vine widely cultivated in several varieties for its large sweet tuberous root with orange flesh
    sweet potato vine; Ipomoea batatas.
  2. noun the edible tuberous root of the sweet potato vine which is grown widely in warm regions of the United States
  3. noun egg-shaped terra cotta wind instrument with a mouthpiece and finger holes
    ocarina.

WordNet

Definitions
  1. (Bot.), a climbing plant (Ipomoea Balatas) allied to the morning-glory. Its farinaceous tubers have a sweetish taste, and are used, when cooked, for food. It is probably a native of Brazil, but is cultivated extensively in the warmer parts of every continent, and even as far north as New Jersey. The name potato was applied to this plant before it was to the Solanum tuberosum, and this is the "potato" of the Southern United States.
Definitions
  1. . (Bot.) See under Potato.

Webster 1913