What is breaker?

breaker cam

Glossary “breaker cam” Definition:
The rotating part, located near the top of the conventional distributor, that has lobes that cause the breaker points to open and close as the shaft is rotated.

breaker points

Glossary “breaker points” Definition:
In a conventional ignition system, an electrical switch that when closed provides current flow in the primary circuit to allow the magnetic field to build. When opened, current flow stops and secondary circuit is discharge, and the spark is delivered to the secondary ignition system. Often called contact points.