hydraulic

• hydraulick (obsolete)

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/

• Audio (US)

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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.

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.