Horologe(n.) A servant who called out the hours.
Horologe(n.) An instrument indicating the time of day; a timepiece of any kind; a watch, clock, or dial.
Horologer(n.) A maker or vender of clocks and watches; one skilled in horology.
Horological(a.) Relating to a horologe, or to horology.
Horology(n.) The science of measuring time, or the principles and art of constructing instruments for measuring and indicating portions of time, as clocks, watches, dials, etc.
Words within horologers