noun (n)

• computer that registers bets and divides the total amount bet among those who won(noun.artifact)

  Synonym:
  pari-mutuel machine, totalisator, totaliser, totalizer
  

  source: wordnet30
• A machine for registering and indicating the number and nature of bets made on horse races, as in Australia and South Africa. Called also totalizer.(noun)

  source: webster1913