The Collaborative International Dictionary of English v.0.48:

Coaita \Co*ai"ta\ (k[-o]*[aum][i^]"t[.a]), n. (Zool.)
   The native name of certain South American monkeys of the
   genus Ateles, esp. Ateles paniscus. The black-faced
   coaita is Ateles ater. See Illustration in Appendix.
   [1913 Webster]