cue ball
pool ball
billiard ball

The most common problem: the pool balls, which have to be regulation size for "42d Street" to work, often wear down.

He smacked his first pool ball the day he could see over the table.

You hit a pool ball, and it starts to carom off the sides of the table.

So it turns out that this simple system of a pool ball on a table has unpredictable behavior.

Holloway's head hit the wall with a sound reminiscent of pool balls cracking on the break.

We're a fly crawling over the far side of one of those pool balls.

Six or seven pool balls were scattered at one end as though someone had scratched on the eight.

The click of pool balls came from the other end of the passage.

He could hear the click of pool balls coming from the billiard room.

Maybe if he brained me with a pool ball or cue stick.