a tree of the sumach family that occurs esp in Argentina and has hard dense wood rich in substances used in tanning and dyeing: genus Schinopsis
the hard dense wood of this tree
a S American tree of the periwinkle family with bark that was formerly used in the treatment of asthma: Aspidosperma quebracho
the bark of this tree
[American Spanish quebracho, alteration of quiebracha, from Spanish quiebra it breaks + hacha axe, from the hardness of the wood]