#clock  a timepiece that shows the time of day
  supertype:  timepiece__timekeeper  a measuring instrument or device for keeping time
  part:  clock_face  movement.action_mechanism
  subtype:  alarm_clock__alarmclock__alarm  a clock that wakes sleeper at preset time
  subtype:  Big_Ben  clock in the clock tower of the Houses of Parliament, London
  subtype:  chronometer  an accurate clock (especially used in navigation)
  subtype:  cuckoo_clock  clock that announces the hours with a sound like the call of the cuckoo
  subtype:  electric_clock  a clock using a small electric motor
  subtype:  pendulum_clock  a clock regulated by a pendulum
     subtype:  grandfather_clock__grandfatherclock__longcase_clock  a pendulum clock enclosed in a tall narrow case
  subtype:  system_clock.clock__systemclock  a time-of-day clock in a computer system
  subtype:  time_clock  clock used to record the hours that people work
  subtype:  turret_clock  a clock with more than one dial to show the time in all directions from a tower
  subtype:  wall_clock  a clock mounted on a wall
  subtype:  water_clock__waterclock__clepsydra__water_glass__waterglas  clock that measures time by the escape of water

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