Definition, Meaning & Synonyms

rotor-arm

noun

/ˈroʊ.tər.ɑːrm/

Definition

A rotor-arm is a component found in the ignition system of some internal combustion engines. It rotates within the distributor to send the electrical spark to the correct cylinder at the right time.

Examples

The mechanic replaced the faulty rotor-arm to improve the engine’s performance.
After checking the rotor-arm, the technician noted it was worn out and needed replacing.

Meaning

The rotor-arm is crucial for the ignition process, directing electricity from the ignition coil to each of the engine’s spark plugs in the correct sequence.