sonickey
nounUK /ˈsɒnɪkiː/
US /ˈsɑːnɪkiː/
A sonickey is a special key that makes a sound when you press it.
She pressed the sonickey on her toy piano and it beeped.
OTHER MEANINGS
2. A musical key that produces a clear, ringing tone.
The sonickey on the old organ rang out across the hall.
3. A password or code that is heard rather than typed.
The robot only opened the door when it heard the sonickey.
4. A small device that makes a high sound to call pets.
He used a sonickey to call his dog back from the garden.