The half circle inside the crease in lacrosse is called the Goal Mouth.
According to the provided reference, the “Goal Mouth” is the 2-inch wide line that forms a half circle with a 6-foot radius, area directly in front of the goal cage with a radius of 6 feet from the center of the goal line extending out from center of the goal line connecting three feet out from both goal lines extended, including the goal line.
