Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of jackscrew is as below...

Jack :: "Jack (n.) A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack..

Jackscrew :: "Jackscrew (n.) A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d Jack, n., 5..

Crick :: Crick (n.) A small jackscrew.

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