The phrase "circular dial" refers to a round or disk-shaped display often used to indicate or measure something, like time on a clock or speed on a speedometer. Full definition
It features a single circular dial with a central tachometer with an LCD needle. (ausmotive.com)
The bottom half is a flat circular dial for quick access to email, phone, PC connection and file areas, as well as general menu navigation. (digitaltrends.com)
We get a good look at the Bentayga's main instruments — a pair of circular dials with a central screen, which is shown displaying both night vision and Sat Nav — a view of a heads - up display and a look at the beautifully finished centre console with cupholders, gear stick and a rotary dial that has a touch sensitive top for stop - start, and rotary function for Bentley's take on Land Rover's Terrain Response. (carsuk.net)