1A faint southern constellation (the Clock), between Hydrus and Eridanus.

1. 1.1as genitive Horologii /ˌhɒrəˈləʊdʒɪʌɪ, -dʒɪiː, -ˈlɒdʒ-/ Used with preceding letter or numeral to designate a star in the constellation Horologium.
   与其前面的字母或数字连用以标记该星座中的某星时钟星座的
   the star R Horologii

   时钟座R星。