- butternut (n.)
[butternut 词源字典]
- also butter-nut, 1753, nut of the white walnut, a North American tree; transferred to the tree itself from 1783. The nut's color was a brownish-gray, hence the word was used (1861) to describe the warm gray color of the Southern army uniforms in the American Civil War.[butternut etymology, butternut origin, 英语词源]