startkey
nounUK /ˈstɑːtkiː/
US /ˈstɑːrtkiː/
A startkey is a special button or key that makes something begin.
Press the startkey to turn on the machine.
OTHER MEANINGS
2. A key on a keyboard that starts a program or process.
The game told me to hit the startkey to play.
3. A code or token used to begin a secure session or process.
The system needs a startkey before it will run.
4. The first key in a sorted list or sequence.
The database returned the startkey of the index.