name · noun · 7 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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General-American:/hɔɹəˈloʊd͡ʒiəm/
General-American:/hɔɹəˈloʊɡiəm/
Received-Pronunciation:/hɒɹəˈləʊd͡ʒɪəm/
Received-Pronunciation:/hɒɹəˈləʊɡɪəm/
1
name
Meaning 1
Synonym of Tower of the Winds, a monument in ancient Athens that included a clepsydra and multiple prominent sundials.
Definition source: English Wiktionary via Wiktextract
Usage: historical
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: Tower of the Winds
Antonyms: none provided
2
name
Meaning 2
Synonym of Solarium, a monument in ancient Rome whose obelisk was once believed to have acted as a sundial gnomon.
Definition source: English Wiktionary via Wiktextract
Usage: historical
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: Solarium
Antonyms: none provided
3
name
Meaning 3
A constellation of the southern sky, said to resemble a pendulum clock. It lies between the constellations Fornax and Dorado.
Definition source: English Wiktionary via Wiktextract
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
name
Meaning 4
Alternative letter-case form of horologium, the book of hours in the Eastern Orthodox and Catholic churches.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of
Topics: Christianity
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
Synonym of chronometer or clock, a timekeeping device.
Definition source: English Wiktionary via Wiktextract
Usage: archaic, historical
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: chronometer or clock
Antonyms: none provided
6
noun
Meaning 6
Synonym of astronomical clock.
Definition source: English Wiktionary via Wiktextract
Usage: uncommon
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: astronomical clock
Antonyms: none provided
7
noun
Meaning 7
Synonym of horologion, the book of hours in Eastern Orthodoxy and Catholicism.
Definition source: English Wiktionary via Wiktextract
Topics: Christianity
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: horologion
Antonyms: none provided
History
Etymology
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.
From Latin horologium, from Ancient Greek ὡρολόγιον (hōrológion). In reference to Eastern Orthodoxy, via its Byzantine Greek development. See menologium. Doublet of horologe.
Across languages
Translations
16 source translations are retained for this English entry.
Chinese Mandarin:
時鐘座 /时钟座
(Shízhōngzuò)
— constellation