/hawr'euh loh"jee euhm, hor'-/ , n. , pl. horologia /-jee euh/ .
1. a building supporting or containing a timepiece, as a clock tower.
2. ( cap. ) Astron. the Clock, a small southern constellation between Eridanus and Dorado.
[ 1655-65; horológion, equiv. to horológ ( os ) timeteller ( horo-, comb. form of hóra HOUR + -log-, var. s. of légein to speak, tell + -os adj. suffix) + -ion dim. suffix ]