fid

A square bar of wood or iron, with a shoulder at one end, used to support the weight of the top-mast when erected at the head of the lower mast, by passing through a mortise or hole at the lower end of the former, and resting its ends on the trestle-trees, which are sustained by the head of the latter; the fid, therefore, must be withdrawn every time the mast is lowered; the topgallant-mast is retained at the head of the top-mast in the same manner. There is also a patent screw fid, which can be removed after hauling taut the mast rope, without having first to lift the mast. (See mast.) A fid is also a conical pin of hard wood, of any size from 10 inches downwards, tapering to a point, used to open the strands of a rope in splicing: of these some are large, for splicing cables, and some small, for the bolt-ropes of sails, &c. Fid is improperly applied to metal of the same shape; they are then termed marling-spikes (called stabbers by sail-makers which see). Also, the piece of oakum with which the vent of a gun is plugged. Some call it the vent-plug (which see). Also, colloquially used for a quid or chew of tobacco, or a small but thick piece of anything, as of meat in clumsy carving.