The Collaborative International Dictionary of English v.0.48:

Trumpetwood \Trump"et*wood`\, n. (Bot.)
   A tropical American tree (Cecropia peltata) of the
   Breadfruit family, having hollow stems, which are used for
   wind instruments; -- called also snakewood, and trumpet
   tree.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Cecropia peltata
    n 1: tropical American tree with large peltate leaves and hollow
         stems [syn: trumpetwood, trumpet-wood, trumpet tree,
         snake wood, imbauba, Cecropia peltata]