O·nap·po n. Zool. A nocturnal South American monkey (Callithrix discolor), noted for its agility; -- called also ventriloquist monkey.
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  Ven·tril·o·quist n. One who practices, or is skilled in, ventriloquism.
  Ventriloquist monkey Zool., the onappo; -- so called from the character of its cry.
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