Jaw angle
The corner of the lower jaw below each ear, where the jawline turns up towards the ear.
Also: gonial angle, angle of the mandible
The jaw angle, or gonial angle, is the corner where the back edge of the mandible meets its lower edge. A sharper, more visible angle gives a square look; a wider, softer angle gives a rounder one. The angle is shaped by bone and by the masseter, the main chewing muscle that sits over it. Jaw angles vary widely among people everywhere, and they soften with age as skin and muscle change.