solenoid
/ˈsoʊlənɔɪd/
noun
- A coil of wire that acts like a magnet when an electric current passes through it, often used to move a metal rod or switch something on and off.
- The car's starter uses a solenoid to engage the engine's flywheel.
- When you press the doorbell, a solenoid pulls the hammer to strike the bell.
- The engineer replaced the faulty solenoid in the industrial valve system.