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Definition of: hydraulic
(hī·drô′lik) adjective
1. Pertaining to hydraulics, involving the moving of water, or force exerted by water: hydraulic engineering, mining, etc.
2. Denoting any of various machines and structures operating by means of water or other liquid under pressure: a hydraulic elevator, crane, ram, press, etc.
3. Hardening under water: hydraulic cement. Also hy·drau′li·cal. [<L hydraulicus <Gk. hydraulikos of a water organ <hydraulos water organ <hydōr water + aulos pipe]
—hy·drau′li·cal·ly adverb
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