pressbutton
nounUK /ˈprɛsˌbʌtən/
US /ˈprɛsˌbʌtən/
A button you push to make something work.
Press the pressbutton to start the toy car.
OTHER MEANINGS
2. A small button on a machine or device that starts or stops it.
The pressbutton on the elevator lit up when she touched it.
3. A button that springs back after being pressed.
He rang the doorbell by tapping the pressbutton.
4. A switch that works only while it is being held down.
The drill runs only while you keep the pressbutton pressed.