commutator
🇺🇸
/ˈkɑːmjuteɪtər/
🇬🇧
/ˈkɒmjuteɪtə(r)/
A part in an electric motor that lets the motor spin in different directions.
The commutator in the electric fan helps it spin both clockwise and counterclockwise.
A part in an electric motor that changes the direction of the electric current.
The commutator in the toy car's motor allows it to move forward and backward.