horologium

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Horologium¹

Where it comes from

See horologium. As a location in Rome, a clipping of Latin Hōrologium Augustī (“Sundial of Augustus”). As a constellation, a clipping of Latin Hōrologium Oscillitorium (“Pendulum Clock”), coined in 1763 by the French astronomer De Lacaille to honor the Dutch astronomer and mathematician Christian Huygens, who had written a major work by that name.

proper noun

  1. historical Synonym of Tower of the Winds, a monument in ancient Athens that included a clepsydra and multiple prominent sundials.

    Similar: Tower of the Winds

  2. historical Synonym of Solarium, a monument in ancient Rome whose obelisk was once believed to have acted as a sundial gnomon.

    Similar: Solarium

  3. A constellation of the southern sky, said to resemble a pendulum clock. It lies between the constellations Fornax and Dorado.
  4. Alternative letter-case form of horologium, the book of hours in the Eastern Orthodox and Catholic churches.

horologium²

  • /hɔɹəˈloʊd͡ʒiəm/ US
  • /hɔɹəˈloʊɡiəm/ US
  • /hɒɹəˈləʊd͡ʒɪəm/ UK
  • /hɒɹəˈləʊɡɪəm/ UK

Where it comes from

From Latin horologium, from Ancient Greek ὡρολόγιον (hōrológion). In reference to Eastern Orthodoxy, via its Medieval Greek development. See menologium. Doublet of horologe.

noun horologiums · horologia · Horologium

  1. archaic, historical Synonym of chronometer or clock, a timekeeping device.

    Similar: chronometer or clock

  2. uncommon Synonym of astronomical clock.

    Similar: astronomical clock

  3. Synonym of horologion, the book of hours in Eastern Orthodoxy and Catholicism.

    Similar: horologion

Translations

Every language

name constellation

EspañolHorologium
한국어시계(時計)자리 Sigyejari
日本語時計座 Tokeiza, とけい座 Tokeiza
中文時鐘座 /时钟座 Shízhōngzuò
FrançaisHorloge
DeutschPendeluhr
ΕλληνικάΩρολόγιον Orológion
РусскийЧасы́ Časý

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MLA

"horologium." Wiktionary, via Micwyn, micwyn.com/word/horologium. Accessed 6 Nov. 2026.

APA

horologium. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/horologium

Chicago

"horologium." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/horologium.

BibTeX
@misc{horologium_2026,
  title = {horologium},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/horologium},
  urldate = {2026-11-06}
}