The Collaborative International Dictionary
oil nut
Butternut \But"ter*nut`\, n.
(Bot.) 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.
(Bot.) The nut of the Caryocar butyrosum and Caryocar nuciferum, of S. America; -- called also Souari nut.
WordNet
oil nut
n. oily drupaceous fruit of rabbitwood [syn: buffalo nut, elk nut]