rotary control
nounUK /ˈrəʊtəri kənˈtrəʊl/
US /ˈroʊtəri kənˈtroʊl/
A round knob you turn to make something work or change.
Turn the rotary control to make the music louder.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A control that works by turning in a circle instead of sliding or pressing.
The old radio has a rotary control for tuning stations.
3. A dial used to set the temperature on an oven or heater.
Turn the rotary control to set the oven to 200 degrees.
4. A knob on a machine that adjusts speed or power.
The fan's rotary control lets you pick three speeds.