noun
reciprocation
Repeated movement back and forth.
The piston's steady reciprocation keeps the pump moving water.
Etymology
The source verb names motion in alternating directions. Reciprocation is the repeated action, especially of a mechanism moving along the same path.
More examples
- The mechanism converts rotation into reciprocation.
- Rapid reciprocation of the saw blade cuts through the wood.
- A guide keeps the rod aligned during reciprocation.
Forms
reciprocation · reciprocations
reciprocate verb — To move repeatedly back and forth.
Similar words
- oscillation
- Often describes swinging around a central point rather than straight-line travel.
- vibration
- Usually describes rapid, small movements around a fixed position.