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Alternative forms[edit]


From French hydraulique, from Latin hydraulicus, from Ancient Greek ὑδραυλικός (hudraulikós, of a water organ), from ὕδραυλις (húdraulis, water organ), from ὕδωρ (húdōr, water) +‎ αὐλός (aulós, pipe).[1]


  • (UK) IPA(key): /haɪˈdɹɒlɪk/
  • (US) IPA(key): /haɪˈdɹɔːlɪk/
  • (file)


hydraulic (not comparable)

  1. Pertaining to water. [from early 17th c.]
    • 1757, Antoine-Simon Le Page du Pratz, History of Louisiana, page 47:
      Tho' there are but seventeen feet water[sic] in the channel, I have seen vessels of five hundred ton enter into it. I know not why this entrance is left so neglected, as we are not in want of able engineers in France, in the hydraulic branch, a part of the mathematics to which I have most applyed[sic] myself.
  2. Related to, or operated by, hydraulics.
    A hydraulic press is operated by the differential pressure of water on pistons of different dimensions.

Derived terms[edit]



hydraulic (third-person singular simple present hydraulics, present participle hydraulicking, simple past and past participle hydraulicked)

  1. (transitive) To mine using the technique of hydraulic mining.


  1. ^ Douglas Harper (2001–2024), “hydraulic”, in Online Etymology Dictionary.