The Collaborative International Dictionary of English v.0.48:

cocuswood \co"cus*wood`\, cocus wood \co"cus wood`\
   A West Indian wood obtained from the granadilla tree, used
   for making flutes, clarinets, and other musical instruments.
   [Also spelled cocoswood.]

   Syn: granadilla wood.
        [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

cocuswood
    n 1: wood of the granadilla tree used for making musical
         instruments especially clarinets [syn: cocuswood,
         cocoswood, granadilla wood]