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)

See also

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  • Ball two, the second non-strike thrown to a batter in baseball or softball