• synonyms


[hahy-draw-luh s]
noun, plural hy·drau·li [hahy-draw-lahy] /haɪˈdrɔ laɪ/, hy·drau·lus·es.
  1. a pipe organ of ancient Greece and Rome using water pressure to maintain the air supply.
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Origin of hydraulus

1870–75; < Latin < Greek hýdraulos water organ, equivalent to hydr- hydr-1 + aulós pipe
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for hydraulus

Historical Examples of hydraulus

  • (mosaics), where the buccinator is accompanied on the hydraulus.

    Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3