Groundnut

1. n. A European plant of the genus Bunium (B. flexuosum), having an edible root of a globular shape and sweet, aromatic taste; — called also earthnut, earth chestnut, hawknut, and pignut.
2. n. The fruit of the Arachis hypogaea (native country uncertain); the peanut; the earthnut.
3. n. A leguminous, twining plant (Apios tuberosa), producing clusters of dark purple flowers and having a root tuberous and pleasant to the taste.
4. n. The dwarf ginseng (Aralia trifolia).

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.