jackscrew

A jack operated by a screw.

See jack, 11 .

The screw-mechanism forming part of a dental instrument called a screw-jack (which see), for regulating the teeth.

A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d jack, n., 5.

A jack (mechanical lifting device) which is operated by turning a leadscrew.

screw-operated jack