Butternut

1. n. The nut of the Caryocar butyrosum and C. nuciferum, of S. America; — called also Souari nut.
2. n. An American tree (Juglans cinerea) of the Walnut family, and its edible fruit; — so called from the oil contained in the latter. Sometimes called oil nut and white walnut.

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.