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Jackscrew - 3 dictionary results

jack⋅screw

[jak-skroo]
–noun
a jack for lifting consisting of a screw steadied by a threaded support and carrying a plate or other part bearing the load.
Also called screw jack.


Origin:
1760–70; jack 1 + screw
jack·screw   (jāk'skrōō')   
n.  A jack operated by a screw. Also called screw jack.

Jackscrew

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