quebracho
noun
que·bra·cho kā-ˈbrä-(ˌ)chō 
ki-
plural quebrachos
1
: any of several trees of southern South America with hard wood: such as
a
: 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
b
: a chiefly Argentine tree (Schinopsis lorentzii) of the cashew family with dense wood rich in tannins
2
a
: the wood of a quebracho
b
: a tannin-rich extract of the Argentine quebracho used in tanning leather
Example Sentences
Recent Examples on the Web The Gran Chaco, which spans from Bolivia and Brazil to Paraguay and Argentina, is extremely bio-diverse, with more than 3,400 plant and 900 animal species – including quebracho blanco trees, tapirs and jaguars. 
Joel E. Correia, The Conversation, 2 Oct. 2019 In Wickett & Craig's case, that's done with the natural tannins from the bark of trees like mimosa and quebracho. Lara Sorokanich, Popular Mechanics, 2 Aug. 2016 There are already plenty of strong woods in the world, like quebracho, snakewood, or African blackwood. David Grossman, Popular Mechanics, 8 Feb. 2018
Joel E. Correia, The Conversation, 2 Oct. 2019 In Wickett & Craig's case, that's done with the natural tannins from the bark of trees like mimosa and quebracho. Lara Sorokanich, Popular Mechanics, 2 Aug. 2016 There are already plenty of strong woods in the world, like quebracho, snakewood, or African blackwood. David Grossman, Popular Mechanics, 8 Feb. 2018 Word History
Etymology
American Spanish, alteration of quiebracha, from Spanish quiebra it breaks + hacha ax
First Known Use
1839, in the meaning defined at sense 1
Medical Definition
quebracho
noun
que·bra·cho kā-ˈbräch-(ˌ)ō, ki-
1
: a tree of the genus Aspidosperma (A. quebracho) of the dogbane family (Apocynaceae) which occurs in Argentina and Chile and whose dried bark is used as a respiratory sedative in dyspnea and in asthma
called also white quebracho
2
: aspidosperma sense 2