horologe(n = noun.artifact) timekeeper, timepiece - a measuring instrument or device for keeping time;
is a kind of measuring device, measuring instrument, measuring system
has parts: balance, balance wheel, dial, escapement, hairspring, hand, time-ball
has particulars: atomic clock, clock, sandglass, sundial, timer, ticker, watch

1.  A servant who called out the hours. [1913 Webster]

2.  An instrument indicating the time of day; a timepiece of any kind; a watch, clock, or dial. Shak. [1913 Webster]

horologe, n. archaic a timepiece.

Etymology:
ME f. OF orloge f. L horologium f. Gk horologion f. hora time + -logos -telling

N  chronometry, horometry, horology, date, epoch, style, era, almanac, calendar, ephemeris, register, registry, chronicle, annals, journal, diary, chronogram, clock, wall clock, pendulum clock, grandfather's clock, cuckoo clock, alarm clock, clock radio, watch, wristwatch, pocket watch, stopwatch, Swiss watch, atomic clock, digital clock, analog clock, quartz watch, water clock, chronometer, chronoscope, chronograph, repeater, timekeeper, timepiece, dial, sundial, gnomon, horologe, pendulum, hourglass, clepsydra, ghurry, chronographer, chronologer, chronologist, timekeeper, annalist, calendar year, leap year, Julian calendar, Gregorian calendar, Chinese calendar, Jewish calendar, perpetual calendar, Farmer's almanac, fiscal year, chronological, chronometrical, chronogrammatical, cinquecento, quattrocento, trecento, o'clock.