Nut
the name popularly given to the roundish fruit of certain trees and shrubs, consisting of a hard shell inclosing a kernel; as, a walnut, a cocoanut, a hazelnut, etc. In the United States, as in England, the name nut, without distinctive prefix, is commonly given to the hazelnut, but in France to the walnut. In mechanism, a short internal screw, which acts in the head of an external screw. and is employed to NUTRITION fasten anything that may become between it and a flange on the bottom of the external screw or bolt. A piece of metal with a cylindrical grooved hole, screwed upon the end of a screw bolt.
In nautics, a projecting nozzle on each side of the shank of an anchor, to hold the stock firmly in its place.