[ hawr-uh-loh-jee-uhm, hor- ]
/ ˌhɔr əˈloʊ dʒi əm, ˌhɒr- /
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noun, plural hor·o·lo·gi·a [hawr-uh-loh-jee-uh, hor-]. /ˌhɔr əˈloʊ dʒi ə, ˌhɒr-/.
a timepiece, as a clock or sundial, or a building supporting or containing a timepiece.
Horologium, Astronomy. the Clock, a small southern constellation between Eridanus and Dorado.
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Origin of horologium

First recorded in 1350–1400; from Latin hōrologium, from Greek hōrológion, equivalent to hōrológ(os) “timeteller” (from hōro-, combining form of hṓra “year, season, time of day, right time” + -log-, variant stem of légein “to count, recount, say, speak, tell” + -os adjective suffix) + -ion diminutive suffix; cf. hour, logos
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use horologium in a sentence

British Dictionary definitions for horologium (1 of 2)

/ (ˌhɒrəˈləʊdʒɪəm) /

noun plural -gia (-dʒɪə)
a clocktower
Also called: horologion (in the Eastern Church) a liturgical book of the offices for the canonical hours, corresponding to the Western breviary

Word Origin for horologium

C17: from Latin; see horologe

British Dictionary definitions for horologium (2 of 2)

/ (ˌhɒrəˈləʊdʒɪəm) /

noun Latin genitive Horologii (ˌhɒrəˈləʊdʒɪaɪ)
a faint constellation in the S hemisphere lying near Eridanus and Hydrus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012