start-stopmachine
nounUK /ˈstɑːt stɒp məˌʃiːn/
US /ˈstɑrt stɑp məˌʃin/
A machine that starts and stops by itself.
The start-stopmachine turns on and off all day.
OTHER MEANINGS
2. A device that controls when something begins and ends.
The start-stopmachine controls the lights in the hall.
3. A car feature that turns the engine off when the car stops.
His new car has a start-stopmachine to save gas.
4. A tool that makes a machine begin and end a task.
The start-stopmachine tells the robot when to work.