buttonlight
nounUK /ˈbʌtənlaɪt/
US /ˈbʌtənlaɪt/
A buttonlight is a small light that shines from a button.
The buttonlight on the remote control helped me find it in the dark.
OTHER MEANINGS
2. A light built into a push button to show that it is on or ready.
Press the buttonlight to start the machine.
3. A small glowing light on a device that shows which button was pressed.
The buttonlight blinked when I chose the right answer.
4. A tiny light attached to a button on clothing or a bag for decoration or safety.
Her jacket had a buttonlight that flashed as she walked.