launchkey
nounUK /ˈlɔːntʃ kiː/
US /ˈlɔːntʃ kiː/
A launchkey is a special key you press to start something.
Press the launchkey to start the rocket game.
OTHER MEANINGS
2. A key on a computer keyboard that opens a program or starts an action.
Hit the launchkey to open the drawing app.
3. A small key used to set off a toy rocket or model.
He turned the launchkey and the toy rocket zoomed up.
4. A special pass or code that lets someone begin a mission or game.
Only the captain has the launchkey for the space mission.