The Collaborative International Dictionary of English v.0.48:

Totalisator \To"tal*i*sa`tor\, n.
   Same as Totalizator.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

totalisator
    n 1: computer that registers bets and divides the total amount
         bet among those who won [syn: pari-mutuel machine,
         totalizer, totaliser, totalizator, totalisator]