#escape_wheel  gear that engages a rocking lever
  supertype:  gear_wheel__gear__cogwheel  a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
  part of:  escapement  mechanical device that regulates movement
     part of:  timepiece__timekeeper  a measuring instrument or device for keeping time

No statement uses or specializes escape_wheel; click here to add one.