The phrase "rotary control" refers to a type of knob or dial that can be turned or rotated to adjust or control something, such as the volume on a radio or the temperature on a thermostat. Full definition
The slim, compact dash has easy - to - use rotary controls for the air conditioner in the center of the dash, just below the radio. (articles.orlandosentinel.com)
A new eight - inch TFT infotainment screen with rotary control will provide access to all the apps. (topspeed.com)
The entire roof system is operated using a single illuminated rotary control located on the roof console. (topspeed.com)