quebracho

enUK

que·bra·cho

Q0023200 (kā-brä′chō)n. pl. que·bra·chos 1. Either of two South American trees, Aspidosperma quebracho-blanco whose bark is used in medicine, or Schinopsis lorentzii whose wood is an important source of tannin.2. The bark or wood of either of these trees.

[Spanish, alteration of quiebrahacha : quebrar, to break (from Latin crepāre, to crack) + hacha, axe (from French hache, from Old French, of Germanic origin).]

quebracho

(keɪˈbrɑːtʃəʊ; Spanish keˈβratʃo) n, pl -chos (-tʃəʊz; Spanish -tʃos) 1. (Plants) either of two anacardiaceous South American trees, Schinopsis lorentzii or S. balansae, having a tannin-rich hard wood used in tanning and dyeing2. (Plants) an apocynaceous South American tree, Aspidosperma quebrachoblanco, whose bark yields alkaloids used in medicine and tanning3. (Forestry) the wood or bark of any of these trees4. (Plants) any of various other South American trees having hard wood[C19: from American Spanish, from quiebracha, from quebrar to break (from Latin crepāre to rattle) + hacha axe (from French hache)]

que•bra•cho

(keɪˈbrɑ tʃoʊ)

n., pl. -chos. 1. any of several tropical American trees having very hard wood, esp. Schinopsis lorentzii, the wood and bark of which are used in tanning and dyeing. 2. a tree, Aspidosperma quebrachoblanco, of the dogbane family, yielding a medicinal bark. 3. the wood or bark of any of these trees. [1880–85; < American Spanish quiebracha, quiebra-hacha literally, (it) breaks (the) hatchet]

quebracho

enUK

quebracho

(kābrä`chō), name for a tanning substance and for the trees from which it comes, chiefly the red quebracho, or quebracho colorado (Schinopsis lorentzii), of the family Anacardiaceae (sumacsumac
or sumach
, common name for some members of the Anacardiaceae, a family of trees and shrubs native chiefly to the tropics but ranging into north temperate regions and characterized by resinous, often acrid, sap.
..... Click the link for more information. family). This hardwood tree, native to the Paraguayan subtropics, supplies one of the most durable and heavy of timbers. It also provides much of the vegetable tannin for the leather industry although the populations are being depleted. The heartwood, stripped of its bark and subjected to extraction processes, is about 30% tannin. Quebracho is obtained chiefly from wild trees of the forests of the Gran Chaco of Argentina, Paraguay, and Bolivia. White quebracho (Aspidosperma quebracho-blanco) of the dogbanedogbane,
common name for some members of the Apocynaceae, a family of herbs, shrubs, and trees found in most parts of the world but especially in the tropics, where they are often climbing forms. Many species are native to or naturalized in North America.
..... Click the link for more information. family is one of the other hardwoods similarly used and is native to the same region. Red quebracho is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
..... Click the link for more information. , class Magnoliopsida, order Sapindales, family Anacardiaceae.

Quebracho

the name of several subtropical species of South American trees and of their wood, bark, and tanning extracts. The species Schinopsis balansae and S. quebracho-colorado (also known as S. lorentzii) of the family Anacardiaceae have a hard heavy wood containing approximately 20 percent tannins. The bark of Aspidosperma quebracho-bianco of the family Apocynaceae contains alkaloids (the most active, yohimbine) and approximately 25 percent tannins.

quebracho

[kā′bra·chō] (botany) Any of a number of South American trees in different genera in the order Sapindales, but all being a valuable source of wood, bark, and tannin. (materials) A drilling-fluid additive used for thinning or dispersing in order to control viscosity and thixotropy; made from an extract of the quebracho tree and consisting essentially of tannic acid.

单词	quebracho
释义	quebracho enUK que·bra·cho Q0023200 (kā-brä′chō)n. pl. que·bra·chos 1. Either of two South American trees, Aspidosperma quebracho-blanco whose bark is used in medicine, or Schinopsis lorentzii whose wood is an important source of tannin.2. The bark or wood of either of these trees. [Spanish, alteration of quiebrahacha : quebrar, to break (from Latin crepāre, to crack) + hacha, axe (from French hache, from Old French, of Germanic origin).] quebracho (keɪˈbrɑːtʃəʊ; Spanish keˈβratʃo) n, pl -chos (-tʃəʊz; Spanish -tʃos) 1. (Plants) either of two anacardiaceous South American trees, Schinopsis lorentzii or S. balansae, having a tannin-rich hard wood used in tanning and dyeing2. (Plants) an apocynaceous South American tree, Aspidosperma quebrachoblanco, whose bark yields alkaloids used in medicine and tanning3. (Forestry) the wood or bark of any of these trees4. (Plants) any of various other South American trees having hard wood[C19: from American Spanish, from quiebracha, from quebrar to break (from Latin crepāre to rattle) + hacha axe (from French hache)] que•bra•cho (keɪˈbrɑ tʃoʊ) n., pl. -chos. 1. any of several tropical American trees having very hard wood, esp. Schinopsis lorentzii, the wood and bark of which are used in tanning and dyeing. 2. a tree, Aspidosperma quebrachoblanco, of the dogbane family, yielding a medicinal bark. 3. the wood or bark of any of these trees. [1880–85; < American Spanish quiebracha, quiebra-hacha literally, (it) breaks (the) hatchet] quebracho enUK quebracho (kābrä`chō), name for a tanning substance and for the trees from which it comes, chiefly the red quebracho, or quebracho colorado (Schinopsis lorentzii), of the family Anacardiaceae (sumacsumac or sumach , common name for some members of the Anacardiaceae, a family of trees and shrubs native chiefly to the tropics but ranging into north temperate regions and characterized by resinous, often acrid, sap. ..... Click the link for more information. family). This hardwood tree, native to the Paraguayan subtropics, supplies one of the most durable and heavy of timbers. It also provides much of the vegetable tannin for the leather industry although the populations are being depleted. The heartwood, stripped of its bark and subjected to extraction processes, is about 30% tannin. Quebracho is obtained chiefly from wild trees of the forests of the Gran Chaco of Argentina, Paraguay, and Bolivia. White quebracho (Aspidosperma quebracho-blanco) of the dogbanedogbane, common name for some members of the Apocynaceae, a family of herbs, shrubs, and trees found in most parts of the world but especially in the tropics, where they are often climbing forms. Many species are native to or naturalized in North America. ..... Click the link for more information. family is one of the other hardwoods similarly used and is native to the same region. Red quebracho is classified in the division MagnoliophytaMagnoliophyta , division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem). ..... Click the link for more information. , class Magnoliopsida, order Sapindales, family Anacardiaceae. Quebracho the name of several subtropical species of South American trees and of their wood, bark, and tanning extracts. The species Schinopsis balansae and S. quebracho-colorado (also known as S. lorentzii) of the family Anacardiaceae have a hard heavy wood containing approximately 20 percent tannins. The bark of Aspidosperma quebracho-bianco of the family Apocynaceae contains alkaloids (the most active, yohimbine) and approximately 25 percent tannins. quebracho [kā′bra·chō] (botany) Any of a number of South American trees in different genera in the order Sapindales, but all being a valuable source of wood, bark, and tannin. (materials) A drilling-fluid additive used for thinning or dispersing in order to control viscosity and thixotropy; made from an extract of the quebracho tree and consisting essentially of tannic acid. quebracho enUK que·bra·cho (kē-brah'chō), The dried bark of a genus of trees, Aspidosperma quebrachoblanco; white quebracho (family Apocynaceae); has been used as a respiratory stimulant in emphysema, dyspnea, and chronic bronchitis; the two chief alkaloids are aspidospermine and quebrachine. [Port. quebrahacho, fr. quebrar, to break, + hacha, axe, referring to the hardness of the wood]
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