- a plant with edible tubers or tuberlike parts, as the peanut
- the edible tuber or tuberlike part
See groundnut in American Heritage Dictionary 4
a. A climbing vine (Apios americana) of eastern North America, having compound leaves, clusters of fragrant brownish flowers, and small edible tubers.
b. Any of several plants having underground tubers or nutlike parts.
c. The tuber or nutlike part of such a plant.
- Chiefly British and South Atlantic U.S. A peanut.
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