The Collaborative International Dictionary of English v.0.48:

Araroba \Ar`a*ro"ba\, n. [Tupi.]
   1. Goa powder.
      [Webster 1913 Suppl.]

   2. A fabaceous tree of Brazil (Centrolobium robustum)
      having handsomely striped wood; -- called also
      zebrawood.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Centrolobium robustum
    n 1: Brazilian tree with handsomely marked wood [syn: arariba,
         Centrolobium robustum]