Definitions for "Center mark"
A line, 2 inches wide and 14 inches long, that marks the midpoint of the baseline.
Marks may be printed halfway on the left side and at the top center of each page received. This makes it easier for you to position the hole puncher correctly when filing received messages.
This is the small line you find across the middle of the Baseline. You must be the correct side of this line while serving.
Keywords:  bully, middle, yards, pitch, diameter
A spot in the middle of the pitch where the ball is placed for a bully.
The circle at the middle of the field. It should be 10 yards in diameter.