Hydraulic jack

	See under Jack.
	a jack used for lifting, pulling, or forcing, consisting of a compact portable hydrostatic press, with its pump and a reservoir containing a supply of liquid, as oil.

hydraulic jack

[hī′drȯ·lik ′jak] (mechanical engineering) A jack in which force is applied through the mechanism of a hydraulic press.

hydraulic jack

hydraulic jack A jack operated by means of a liquid, usually oil, acting against a piston; a small force, applied by means of a lever attached to a small piston, produces a very large force on a large piston.

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