A (usually) metal fastener consisting of a shank partially or completely threadedshank, sometimes with a threaded point, and a head used to both hold the top material and to drive the screw either directly into a soft material or into a prepared hole.
(US, slang, dated) An instructor who examines with great or unnecessary severity; also, a searching or strict examination of a student by an instructor.
(dated) An old, worn-out, unsound and worthless horse.
(mathematics) A straight line in space with which a definite linearmagnitude termed the pitch is associated. It is used to express the displacement of a rigid body, which may always be made to consist of a rotation about an axis combined with a translationparallel to that axis.
