See also: ὡρολόγιον Greek Proper noun Ωρολόγιον • (Orológion) n (astronomy) Horologium (constellation) Declension More information singular, nominative ... Declension of Ωρολόγιον singular nominative Ωρολόγιον (Orológion) genitive Ωρολογίου (Orologíou) accusative Ωρολόγιον (Orológion) vocative Ωρολόγιον (Orológion) Close Further reading Ωρολόγιον on the Greek Wikipedia.Wikipedia el Wikiwand - on Seamless Wikipedia browsing. On steroids.