The Collaborative International Dictionary of English v.0.48:

Cohune \Co*hune"\, n., or Cohune palm \Cohune palm\ . [Prob. fr.
   a native name in Honduras.]
   A Central and South American pinnate-leaved palm (Attalea
   cohune), the very large and hard nuts of which are turned to
   make fancy articles, and also yield an oil used as a
   substitute for coconut oil.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

cohune
    n 1: tropical American feather palm whose large nuts yield
         valuable oil and a kind of vegetable ivory [syn: cohune
         palm, Orbignya cohune, cohune]