• synonyms


[hahy-draw-liks, -drol-iks]
noun (used with a singular verb)
  1. the science that deals with the laws governing water or other liquids in motion and their applications in engineering; practical or applied hydrodynamics.
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Origin of hydraulics

First recorded in 1665–75; see origin at hydraulic, -ics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hydraulics


  1. (functioning as singular) another name for fluid mechanics
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hydraulics


1670s, from hydraulic; also see -ics.

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Online Etymology Dictionary, © 2010 Douglas Harper

hydraulics in Science


  1. The scientific study of water and other liquids, in particular their behavior under the influence of mechanical forces and their related uses in engineering.
  2. A mechanical device or system using hydraulic components.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.