escapement
noun
Definitions
The contrivance in a timepiece (winding wristwatch) 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.
A mechanism found in devices such as a typewriter or printer which controls lateral motion of the carriage.
An escape or means of escape.
The number of fish that escape commercial fishing operations and travel upstream to spawn.