The bricks having one or two edges rounded for use in slightly curved corners are called 

Explanation:

Bullnose brick is the brick with one rounded angle. The connection formed when a wall finishes a turn is called quoin. Bullnose brick are used to make rounded construction purpose. It is commonly used in the rounded edge for staircase steps, building corners, verandahs, etc. it is not used in construction of arches.

Channel Bricks: They are molded into the shape of a gutter or channel. They are used in drains.

Cownose Brick: A brick molded with a double bullnose on end is known as a cownose.