Hypertext Webster Gateway: "jackscrew"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Jackscrew \Jack"screw`\, n.
A jack in which a screw is used for lifting, or exerting
pressure. See Illust. of 2d {Jack}, n., 5.
From WordNet (r) 1.7 (wn)
jackscrew
n : screw-operated jack [syn: {screw jack}]
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