| butternut | 1. <botany> 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. 2. <botany> The nut of the Caryocar butyrosum and C. Nuciferum, of S. America. Synonym: Souari nut. Source: Websters Dictionary (01 Mar 1998) |
|---|