screw jack

American

noun

jackscrew.

screw jack British

noun

Also called: jackscrew. jack. a lifting device utilizing the mechanical advantage of a screw thread, the effort being applied through a bevel drive

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of screw jack

First recorded in 1710–20

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The forward end of each section was supported by a screw jack placed under a rib 2 ft. from the front end.

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

The shells of the molds were of ¼-in. steel plate; the jack was an ordinary screw jack.

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023