initialswitch
nounUK /ɪˈnɪʃəl swɪtʃ/
US /ɪˈnɪʃəl swɪtʃ/
The first switch you press to turn something on.
Press the initialswitch to start the toy robot.
OTHER MEANINGS
2. The beginning setting of a machine before it starts working.
Set the initialswitch to low before you begin.
3. A first change in a plan or game.
The initialswitch in the rules made the game easier.
4. The first turn-on point in a computer program.
The program checks the initialswitch when it loads.