Source : Webster's Revised Unabridged Dictionary (1913)

Blackwood \Black"wood\, n.
   A name given to several dark-colored timbers. The East Indian
   black wood is from the tree {Dalbergia latifolia}. --Balfour.

Source : WordNet®

blackwood
     n 1: very dark wood of any of several blackwood trees
     2: any of several hardwood trees yielding very dark-colored
        wood [syn: {blackwood tree}]