10¹⁵, a thousand billion (long scale) or a million milliard.
A dynamical system in which a particle alternates between motion in a straight line and specular reflections from a boundary.
Pertaining to the game of billiards.
A shot in billiards or snooker in which the cue ball strikes two other balls; a carom.
A billion quintillion: 1 followed by 42 zeros, 10⁴².
A trillion trillion: 1 followed by 24 zeros, 10²⁴.