A shot in billiards or snooker in which the cue ball strikes two other balls; a carom.
"After practicing for hours, he finally managed to execute a perfect billiard where the cue ball bounced off both object balls before stopping near the pocket."
10¹⁵, a thousand billion (long scale) or a million milliard.
"The astronomer explained that the estimated number of stars in the observable universe is far greater than a single billiard on the long scale."