Two-ball

Two-ball, twoball, 2-ball, or 2 ball may refer to:


 * 2 ball, the pool ball (pocket billiards) numbered "2" and colored blue
 * 2 ball, the yellow snooker ball, worth two points, normally referred to as "the yellow"
 * 2-ball, a two-dimensional n-ball in mathematics, represented by a circle (disc)