clock Copy link Outline 1. hōrŏlŏgium (gen. term for an instrument to mark the time)2. sōlārium3. hōrae, arum4. clepsydra (a water-clock • clock: 1. hōrŏlŏgium (gen. term for an instrument to mark the time): Cic.: Plin. A c. goes, stops, is right, wrong, (perh.) h. movetur, moveri desinit, ad horas congruit, non congruit; recte, perperam horas indicat (chiefly from Kr.). 2. sōlārium: prop. a sun-dial; but also used by Cic. of a water-clock (s. ex aqua. N. D. 2, 34, 87). 3. hōrae, arum: when we see anything moved by certain machinery, as a sphere, a c., quum machinatione quadam moveri aliquid videmus, ut sphaeram, ut horas, Cic. 4. clepsydra (a water-clock: Gr. κλεφύδρα): Cic.: Sen.: Phr.: what o'c. is it? hora quota est, Hor.: to ask what o'c. it is, horas requirere, Sen.; horas quaerere, Plin.: at two (or according to our reckoning about 8 a. m.) o'c. next day, hora secunda postridie, Cic.