Escapement /(?)/

Es·cape·ment

Escapement

n.
  1. The act of escaping; escape. [R.]
  2. Way of escape; vent. [R.]
    An escapement for youthful high spirits.
  3. The contrivance in a timepiece which connects the train of wheel work with the pendulum or balance, giving to the latter the impulse by which it is kept in vibration; -- so called because it allows a tooth to escape from a pallet at each vibration.