Emily Dickinson Lexicon

NUT, n. [Sax. hnut; D. noot; G. nuss; Sw. nöt; Dan. nödd; Ir. cnudh; W. cna, cnau. It seems to be allied to knot, a bunch or hard lump.]

1. The fruit of certain trees and shrubs, consisting of a hard shell inclosing a kernel. Various kinds of nuts are distinguished; as, walnut, chestnut, hazelnut, butternut.
2. In mechanics, a small cylinder or other body, with teeth or projections corresponding with the teeth or grooves of a wheel. Wilkins. Ray.
3. The projection near the eye of an anchor. Mar. Dict.
4. A small block of metal containing a concave screw, called also a burr.