totalizator

noun

1. an apparatus for registering and indicating the total of operations, measurements, etc.
2. a pari-mutuel machine.

noun

1. a system of betting on horse races in which the aggregate stake, less an administration charge and tax, is paid out to winners in proportion to their stake
2. the machine that records bets in this system and works out odds, pays out winnings, etc
3. an apparatus for registering totals, as of a particular function or measurement