[Sp. quebracho, also quiebra-hacha, f. quebrar to break + hacha axe.] The name of several American trees, having extremely hard timber and medicinal bark; esp. the white quebracho of S. Americn (Aspidosperma Quebracho) and the red quebracho of Mexico (Schinopsis Lorentzii). Also attrib. as quebracho bark, gum. b. = Quebracho-bark. Hence Quebrachamine, Quebrachine, alkaloids found in quebracho-bark.
1881. Watts, Dict. Chem., 3rd Suppl. 916, 1731.
1891. W. Martindale, Extra Pharmacop. (ed. 6), 325. White Quebracho Bark … imported from the Argentine Republic. Ibid. Quebracho contains six alkaloids,… Quebrachine, Quebrachamine [etc.].
1897. Syd. Soc. Lex., s.v., Quebracho is a valuable remedy for dyspnœa.
