mediakey
nounUK /ˈmiːdiə kiː/
US /ˈmiːdiə kiː/
A button on a keyboard that controls music or videos.
Press the mediakey to pause the song.
OTHER MEANINGS
2. A key on a remote control that starts or stops media.
The mediakey on the remote turned on the movie.
3. A special key that opens a media player program.
She tapped the mediakey to launch the music app.
4. A keyboard shortcut assigned to control sound or video.
You can set a mediakey to mute the speakers.