dial
n. countable B1 Intermediate US //ˈdaɪəɫ// UK //dˈaɪəl// di·al
n. the round part of a machine or clock that shows information or lets you choose a setting. You turn it to change things like the volume on a radio or the heat on a stove.
n. a face or plate on a device that displays measurements or allows for the selection of settings via a rotating control.
He turned the dial to increase the volume.
The old radio has a large circular dial that glows in the dark when the power is on.
Engineers replaced the physical dial with a digital interface, though many users preferred the tactile feedback of the original mechanical component.
Usage
Often used with the verb 'turn' or 'set'.