: any of several trees of southern South America with hard wood: such as
: a tree (Aspidosperma quebracho) of the dogbane family which occurs chiefly in Argentina and Chile and whose dried bark is used as a respiratory sedative in dyspnea and in asthma
: a chiefly Argentine tree (Schinopsis lorentzii) of the cashew family with dense wood rich in tannins
: the wood of a quebracho
: a tannin-rich extract of the Argentine quebracho used in tanning leather
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