The Collaborative International Dictionary of English v.0.48:

Myroxylon \My*rox"y*lon\, prop. n. [NL., fr. Gr. my`ron a sweet
   juice distilling from a plant + xy`lon wood.] (Bot.)
   A genus of leguminous trees of tropical America, the
   different species of which yield balsamic products, among
   which are balsam of Peru, and balsam of Tolu. The species
   were formerly referred to Myrospermum.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Myroxylon
    n 1: a genus of tropical American trees having pinnate leaves
         and white flowers [syn: Myroxylon, genus Myroxylon]