ho·rol·o·gy /-ʤi/
  鐘錶學,鐘錶製造術,測時法
  Ho·rol·o·gy 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.
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  horology
       n : the art of designing and making clocks