请输入您要查询的英文单词:

 

单词 quercitannic
释义

quercitannicadj.

Brit. /ˌkwəːsᵻˈtanɪk/, U.S. /ˌkwərsəˈtænɪk/
Origin: A borrowing from Latin, combined with an English element; modelled on a German lexical item. Etymons: Latin querci- , quercus , tannic adj.
Etymology: < post-classical Latin querci-, combining form of classical Latin quercus oak (see quercine adj.) + tannic adj., after French quercitannique (1841 or earlier), apparently originally translating German Eichengerbsäure (1841 or earlier), apparently itself translating Swedish eke-garvsyra (Berzelius 1836, in Årsberättelser om Vetenskapernas Framsteg, afgifne af Kongl. Vetenskaps-Academiens Embetsmän 196).
Chemistry.
quercitannic acid n. a tannin found in oak bark.
ΚΠ
1845 W. Gregory Outl. Chem. ii. 416 Tannic Acid..Syn. Quercitannic Acid, Tannine. This acid occurs chiefly in oak-bark and in nut-galls.
1884 Encycl. Brit. XVII. 692/1 The astringent principle [of oak bark] is a peculiar kind of tannic acid, called by chemists querci-tannic.
1934 C. C. Steele Introd. Plant Biochem. vi. xviii. 193 A number of bark tannins belong to this group, viz...maletto tannin from the bark of Eucalyptus occidentalis, and quercitannic acid from Oak bark (Quercus).
1972 Bottlers' Year Bk. 1972–3 388 Clove oil content of quercitannic acid is a useful factor in analysis of the oil.

Derivatives

ˈquercitannin n. now rare = quercitannic acid n. at main sense.
ΚΠ
1852 C. Morfit Arts of Tanning, Currying, & Leather-dressing vi. 78 The tannin of tea is similar in properties to quercitannin.
1895 Naturalist 25 A tannin, which is probably quercitannin.
1911 W. P. Dreaper in W. A. Davis & S. Sadtler Allen's Commerc. Org. Anal. V. 24 (heading) Quercitannic acid. Quercitannin.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
<
adj.1845
随便看

 

英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/1/3 20:02:45