parimutuel

/ˌpɛrɪˈmjutʃuəl/
noun
  1. A betting system where all bets on a race or event are pooled together, and the winners share the total pool (minus a percentage for the operator).
    • At the horse track, they use a parimutuel system to calculate payouts.
    • Many gamblers prefer parimutuel betting because the odds change as more people place bets.
    • The parimutuel at the dog race paid out more than expected because of a longshot winner.
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