The Collaborative International Dictionary of English v.0.48:

Totalizator \To"tal*i*za`tor\, n. [From Totalize: cf. F.
   totalisateur.]
   A machine for registering and indicating the number and
   nature of bets made on horse races. Called also totalizer.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Totalizer \To"tal*i`zer\, n.
   Same as Totalizator.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

totalizer
    n 1: computer that registers bets and divides the total amount
         bet among those who won [syn: pari-mutuel machine,
         totalizer, totaliser, totalizator, totalisator]
    2: a calculator that performs simple arithmetic functions [syn:
       adding machine, totalizer, totaliser]