Etymologically

hydraulicus

Etymology and origin of the Latin word hydraulicus

Confidence
Established
Formation
Borrowing
First attested
c. 84–c. 25 BC, Vitruvius
Borrowed from
Ancient Greek ὑδραυλικός
Ultimate origin
Ancient Greek ὑδραυλικός
Etymology tree
inherited borrowed derived
Latin hydraulicus
English hydraulic

Forms

hydraulicus (feminine hydraulica, neuter hydraulicum); first/second-declension adjective[1][2] Medieval spellings include idraulicus and forms with ydro-.[3][4]

Etymology

It is borrowed from Ancient Greek ὑδραυλικός (hudraulikós, “of the water organ”),[1][5][3] from ὕδωρ (húdōr, “water”) and αὐλός (aulós, “pipe”).[3][6] Within Latin it belongs with hydraulus, the water organ.[7] English hydraulic comes from it through French.[8]

Earliest recorded meaning

Vitruvius is the first to use it: no one, he says, could build “hydraulicas machinas” and similar instruments without a knowledge of music (1.1.9), and he credits Ctesibius with first making them (9.8.4).[7][2][3]

Semantic evolution

Its core use was for the water organ, called machinae or organa hydraulica,[9][2] which Pliny the Elder also ascribes to Ctesibius;[7] the OLD defines it more broadly, of machines worked by water flowing through pipes.[1] Suetonius and Ammianus Marcellinus write of organa hydraulica too.[2][9] Medieval writers kept it for organs: the Annals of Fulda, under the year 826, tell of a priest from Venice who built a water organ at Aachen,[4] William of Malmesbury writes of organa hydraulica,[10] and Osbern of Gloucester glosses it “sweet and sonorous”.[10] As a neuter noun it named a water-driven instrument.[4] Etymonline notes that the Romans extended the Greek term to other water engines.[8]

Timeline

  • c. 84–c. 25 BC – Vitruvius writes of hydraulicae machinae.[7][3]
  • 23/24–79 AD – Pliny the Elder ascribes the hydraulica organa to Ctesibius.[7][3]
  • c. 75–c. 150 AD – Suetonius mentions organa hydraulica.[9][3]
  • c. 390 AD – Ammianus Marcellinus writes of organa hydraulica.[2][3]
  • c. 1600 – English takes it up, through French, as hydraulic.[8]

Meanings

Adjective

  1. Of the water organ;[1][9][2][11] (of machines) worked by water flowing through pipes, hydraulic.[1][9][2][11]
  2. (Medieval Latin) Of an organ: sweet-sounding.[10]

Noun

  1. (Medieval Latin, neuter) A water-driven instrument.[4]

References

  1. ^ a b c d e Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  2. ^ a b c d e f g Georges, Karl Ernst (1913–1918), Ausführliches lateinisch-deutsches Handwörterbuch, 8th ed., ed. Heinrich Georges, Hannover; Leipzig: Hahn
  3. ^ a b c d e f g h Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c d Mittellateinisches Wörterbuch bis zum ausgehenden 13. Jahrhundert (1967–), Munich: C. H. Beck; Bayerische Akademie der Wissenschaften
  5. ^ Saalfeld, Günther Alexander (1874), Index Graecorum vocabulorum in linguam latinam translatorum, Berlin: Weidmann
  6. ^ Conte, Gian Biagio; Pianezzola, Emilio; Ranucci, Giuliano (2010), il Latino: Vocabolario della lingua latina, 3rd ed., Florence: Le Monnier
  7. ^ a b c d e Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  8. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  9. ^ a b c d e Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  10. ^ a b c Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
  11. ^ a b Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.

Borrowed into

Related etymologies

Cite this entry

“Hydraulicus.” Etymologically, 25 Oct. 2026, etymologically.com/la/hydraulicus. Accessed 25 Oct. 2026.

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