buttonrole
nounUK /ˈbʌtən rəʊl/
US /ˈbʌtən roʊl/
A buttonrole is a small button that does a special job when you press it.
Press the buttonrole on the toy to make it sing.
OTHER MEANINGS
2. A role assigned to a button in a computer program.
The developer set a buttonrole for the save icon.
3. The part a button plays in a game or machine.
Each buttonrole on the controller has a different action.
4. A label that tells what a button does.
The buttonrole says 'start' on the screen.