cue ball
pool ball
billiard ball

Computers can manipulate information as light (rather than electricity or billiard balls).

This is pretty much the same issue as black vs white billiard balls.

It resembled a gray billiard ball, or would have if they'd been able to light it up.

You've got about as much brain as a retarded billiard ball.

His bald head was shining like a polished billiard ball.

From space it looked like a slightly damaged billiard ball.

A welcome had been a rarity so far in his life, he was happy to accept one anywhere, even from a talking billiard ball.

It looked exactly like a glossy green billiard ball.

There is a painting in which the billiard balls seem parachuted down onto the table.

The car became a mite scurrying across a giant billiard ball.