SCREW n.
A cylinder, or a cylindrical perforation, having a continuous rib, called the thread, winding round it spirally at a constant inclination, so as to leave a continuous spiral groove, between one turn and the next, -- used chiefly for producing, when revolved, motion or pressure in the direction of its axis, by the slidi…
SOLID a.
oot, contains 1,728 solid inches. -- Solid newel (Arch.), a newel into which the ends of winding stairs are built, in distinction from a hollow newel. See under Hollow, a. -- Solid problem (Geom.), a problem which can be construed geometrically, only by the intersection of a circle and a conic section or of two conic…