Bullnose (brick) - Also known as a bullnose header. A bullnose is a brick with a rounded end-this can be a 'Single Bullnose', 'Bullnose Header on Flat' (both examples shown in top picture) 'Double End Bullnose,' 'Single Bullnose Return' (both examples can be shown in the second picture) or a 'Stop End Bullnose.'
The revolving picture shows ways that bullnose bricks can be used in a pillar for a wall.
Below is a 3D image that shows Bullnose (brick). You can move the 3D object around with your mouse.