noun Billiards, Pool.
Examples from the Web for cue ball
Somebody is liable to take your head off and use it for a cue-ball.Skyrider|B. M. Bower
The second is where the cue-ball, while at rest, is in contact with another ball.
Where the cue-ball, resting on the edge of a pocket, drops into it before the striker has time to play.
Jacqueline had the cue-ball; it lay on the cloth in front of her, and her slim right hand covered it.The Business of Life|Robert W. Chambers
We will suppose the cue-ball to be in hand, and the player desirous of securing a good “break.”