Source : Webster's Revised Unabridged Dictionary (1913)

Ateles \At"e*les\, n. [Gr. ? incomplete; 'a priv. + ?
   completion.] (Zo["o]l.)
   A genus of American monkeys with prehensile tails, and having
   the thumb wanting or rudimentary. See {Spider monkey}, and
   {Coaita}.

Source : WordNet®

Ateles
     n : spider monkeys [syn: {genus Ateles}]