[ jak-skroo ]
/ ˈdʒækˌskru /


a jack for lifting, consisting of a screw steadied by a threaded support and carrying a plate or other part bearing the load.

Origin of jackscrew

First recorded in 1760–70; jack1 + screw
Also called screw jack.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for jackscrew

  • The Indian gazed a moment, then rose quickly, and put on the jackscrew.

    Rolf In The Woods|Ernest Thompson Seton
  • The axle was slightly bent, and a blacksmith had to bring clamps and a jackscrew before the new wheel could be adjusted.

    The Silent Barrier|Louis Tracy

British Dictionary definitions for jackscrew

/ (ˈdʒækˌskruː) /


another name for screw jack
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