释义 |
quercitron
quer·ci·tron Q0026500 (kwûr′sĭ-trən, -trŏn′, kwər-sĭt′rən)n.1. The bright orange inner bark of the eastern black oak, from which a yellow dye is obtained.2. The dye obtained from this bark. [Blend of Latin quercus, oak; see perkwu- in Indo-European roots, and citron.]quercitron (ˈkwɜːsɪtrən) n (Botany) the inner back of a black oak treequer•ci•tron (ˈkwɜr sɪ trən) n. 1. an oak, Quercus velutina, of E North America: the inner bark yields a yellow dye. 2. the bark itself. 3. the dye. [1785–95; < Latin quer(cus) oak + citron] ThesaurusNoun | 1. | quercitron - a yellow dye made from the bark of the quercitron oak treedye, dyestuff - a usually soluble substance for staining or coloring e.g. fabrics or hair | | 2. | quercitron - medium to large deciduous timber tree of the eastern United States and southeastern Canada having dark outer bark and yellow inner bark used for tanning; broad five-lobed leaves are bristle-tippedblack oak, quercitron oak, Quercus velutina, yellow oakoak tree, oak - a deciduous tree of the genus Quercus; has acorns and lobed leaves; "great oaks grow from little acorns" |
Quercitron
Quercitron the cut up bark (or extract of the bark) of several North American oaks (mainly Quercus velutina tinctoria), used to dye silk and wool yellow. Quercitron contains the glycoside quercitrin, which when boiled with acids breaks down into the sugar rhamnose and the dyestuff quercetin (tetraoxy-flavonol: C15H10O7). Quercetin is in the form of lemon-yellow needles, which are poorly soluble in water. quercitron
Synonyms for quercitronnoun a yellow dye made from the bark of the quercitron oak treeRelated Wordsnoun medium to large deciduous timber tree of the eastern United States and southeastern Canada having dark outer bark and yellow inner bark used for tanningSynonyms- black oak
- quercitron oak
- Quercus velutina
- yellow oak
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