oddsmaker

/ˈɑdzˌmeɪkər/
noun
  1. A person or company that sets the odds (probabilities) for betting on sports or other events.
    • Many gamblers rely on the oddsmaker's calculations to decide where to place their money.
    • The oddsmaker predicted the home team would win by at least ten points.
    • Before the big race, the oddsmaker released the betting lines for each horse.
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