#ball  round object that is hit or thrown or kicked in games; "the ball travelled 90 mph on his serve"; "the mayor threw out the first ball"
  supertype:  game_equipment  equipment or apparatus used in playing a game
  subtype:  baseball  a ball used in playing baseball
  subtype:  basketball  an inflated ball used in playing basketball
  subtype:  billiard_ball  ball used in playing billiards
     subtype:  cue_ball__cueball  the ball that the billiard player or pool player strikes with his cue
     subtype:  object_ball  the billiard ball first struck by the cue ball
  subtype:  bocce_ball__bocceball__bocci_ball__bocciball__boccie_ball  wooden ball that is bowled in the Italian game of bocce
  subtype:  bowl.ball  a wooden ball (with flattened sides) used in the game of bowls
  subtype:  bowling_ball__bowlingball  a large ball used for bowling
  subtype:  cricket_ball__cricketball  ball used in playing cricket
  subtype:  croquet_ball__croquetball  a wooden ball used in playing croquet
  subtype:  field_hockey_ball  ball used in playing field hockey
  subtype:  football.ball  the inflated oblong ball used in playing American football
  subtype:  golf_ball  a small hard ball used in playing golf; dimpled to reduce wind resistance
  subtype:  handball.ball  a small rubber ball used in the game of handball
  subtype:  lacrosse_ball  ball used in playing lacrosse
  subtype:  marble.ball  a small ball of glass that is used in various games
     subtype:  taw.marble__shooter  a large marble used for shooting in the game of marbles
  subtype:  medicine_ball  heavy ball used in physical training
  subtype:  ninepin_ball__ninepinball__skittleball  ball used to knock down ninepins
  subtype:  ping-pong_ball  light hollow ball used in playing table tennis
  subtype:  polo_ball  wooden ball struck with mallets in playing polo
  subtype:  pool_ball  ball used in playing pool
     subtype:  eight_ball__eightball  a black pool ball bearing the number 8; should be the last to go in certain pool games
  subtype:  punching_bag__punching_ball__punchball  an inflated ball or bag that is suspended and punched for training in boxing
  subtype:  racquetball.ball  the ball used in playing the game of racquetball
  subtype:  roulette_ball  the ball used to play roulette
  subtype:  rugby_ball__rugbyball  inflated oval ball used in playing rugby
  subtype:  soccer_ball  an inflated ball used in playing soccer
  subtype:  softball__playground_ball  ball used in playing softball
  subtype:  squash_ball  rubber ball used in playing squash
  subtype:  tennis_ball  ball about the size of a fist used in playing tennis
  subtype:  volleyball  an inflated ball used in playing volleyball
  subtype:  wiffle_ball__wiffle  (trade mark) a hollow plastic ball with cutouts

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