Wordnet 3.0
NOUN (1)
1.
someone who sets the betting odds based on calculations of the outcome of a contest (especially a horse race);
[syn: odds-maker, handicapper]
The Collaborative International Dictionary of English v.0.48:
Handicapper \Hand"i*cap`per\ (-k[a^]p`p[~e]r), n.
One who determines the conditions of a handicap.
[1913 Webster]
WordNet (r) 3.0 (2006):
handicapper
n 1: someone who sets the betting odds based on calculations of
the outcome of a contest (especially a horse race) [syn:
odds-maker, handicapper]