shellswitch

noun
UK /ˈʃel.swɪtʃ/
US /ˈʃel.swɪtʃ/

A shellswitch is a small switch that hides inside a shell.

The toy crab has a shellswitch that makes it walk.


OTHER MEANINGS

2. A change of shells, like a hermit crab moving to a new home.

The hermit crab made a shellswitch to a bigger shell.

3. A game where players swap shells to hide a prize.

We played shellswitch at the fair and guessed the right shell.

4. A protective cover that flips open to reveal a control.

Lift the shellswitch on the robot to turn it on.