Sweet potatoes are vegetables that look like large ordinary potatoes but taste sweet. They have pinkish-brown skins and yellow flesh.
sweet potato in British English
noun
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
Also called (NZ): kumara
sweet potato in American English
US
1.
a tropical, trailing plant (Ipomoea batatas) of the morning-glory family, with purplish flowers and a fleshy, brownish, tuberlike root used as a vegetable