2 definitions
for oil nut
From The Collaborative International Dictionary of English v.0.48 :
Butternut \But"ter*nut`\, n.
1. (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.
[1913 Webster]
2. (Bot.) The nut of the Caryocar butyrosum and Caryocar
nuciferum, of S. America; -- called also Souari nut.
[1913 Webster]
From WordNet (r) 2.0 :
oil nut
n : oily drupaceous fruit of rabbitwood [syn: buffalo nut, elk
nut]