hydraulic
Other forms: hydraulics
The adjective hydraulic refers to a process using pressurized water or other fluid to generate great mechanical power, without the wear and tear of gears or levers. Hydraulic systems are popular for use in heavy-duty machinery.
It might seem odd that the original Greek word hydraulikós from which hydraulic comes referred to water (hydra) and also to a musical instrument made from a hollow tube (aulos). You might ask, "What's a musical instrument got to do with hydraulics?" Well, you can see the connection when you know that something that's hydraulic means it is operated through the pressure of water or liquid through a pipe or hose, easily generating great force (instead of music).
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moved or operated or effected by liquid (water or oil)“hydraulic erosion”“hydraulic brakes”
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of or relating to the study of hydraulics“hydraulic engineer”
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Vocabulary lists containing hydraulic
The ancients believed that the universe was composed of five basic elements: earth, air, fire, water, and sky. The Greek and Latin words for these elements still show up in our language today. Learn these words that come from the Greek word hydor, meaning "water." Here are links to our complete set of Elements of the Universe lists: Cosm, Cosmo ("Universe") / Terr, Terra ("Earth") / Geo ("Earth") / Hydr, Hydro ("Water") / Aqua ("Water") / Ign, Igni ("Fire") / Pyr, Pyro ("Fire") / Aer, Aero ("Air") / Aether ("Sky") / Aster, Astro ("Star") / Sol ("Sun")
Words from Round 2 of the 2015 Scripps National Spelling Bee. Full list is here.
This first book of The Heroes of Olympus series introduces fifteen-year-olds Jason Grace, Piper McLean, and Leo Valdez, who are unaware that they are demigods until they are attacked on a school field trip and transported to Camp Half-Blood, where they also learn that Percy Jackson has disappeared and Hera has been imprisoned.