hennotannicadj.

Brit.

/ˌhɛnə(ʊ)ˈtanɪk/, U.S.

/ˌhɛnəˈtænɪk/,

/ˌhɛnoʊˈtænɪk/

Origin: Formed within English, by compounding; modelled on a French lexical item. Etymons: henna n., -o- connective, tannic adj.

Etymology: < henna n. + -o- connective + tannic adj., after French henno-tannique (in acide henno-tannique (Abd-el-Aziz Herraouy 1862, in Répertoire de chim. appliquée 4 403)).

Chemistry.

hennotannic acid n. a reddish-orange crystalline acidic compound responsible for the colour of henna; also called lawsone.Chemical name: 2-hydroxy-1,4-naphthoquinone; C₁₀H₆O₃.

ΚΠ

1863 Boston Med. & Surg. Jrnl. 30 Apr. 260 The coloring matter of henna is therefore a species of tannin, and the author has named it henno-tannic acid.

1961 A. J. E. Moss Textiles & Fabrics xviii. 342 Among those used [in hair dyes] are such ingredients as iron sulphate, glycerin, gallic acid, tannic acid, and extract of henna leaves or, as it is sometimes called, hennotannic acid.

2008 Res. Jrnl. Agric. & Biol. Sci. 4 784 The leaves, flowers and seeds [of Cassia alata] have been reported to contain high levels of anthraquinones, crysophanic, napthoquonine, or hennotannic acids.

This entry has been updated (OED Third Edition, December 2019; most recently modified version published online March 2022).

单词	hennotannic
释义	hennotannicadj. Brit. /ˌhɛnə(ʊ)ˈtanɪk/, U.S. /ˌhɛnəˈtænɪk/, /ˌhɛnoʊˈtænɪk/ Origin: Formed within English, by compounding; modelled on a French lexical item. Etymons: henna n., -o- connective, tannic adj. Etymology: < henna n. + -o- connective + tannic adj., after French henno-tannique (in acide henno-tannique (Abd-el-Aziz Herraouy 1862, in Répertoire de chim. appliquée 4 403)). Chemistry. hennotannic acid n. a reddish-orange crystalline acidic compound responsible for the colour of henna; also called lawsone.Chemical name: 2-hydroxy-1,4-naphthoquinone; C₁₀H₆O₃. ΚΠ 1863 Boston Med. & Surg. Jrnl. 30 Apr. 260 The coloring matter of henna is therefore a species of tannin, and the author has named it henno-tannic acid. 1961 A. J. E. Moss Textiles & Fabrics xviii. 342 Among those used [in hair dyes] are such ingredients as iron sulphate, glycerin, gallic acid, tannic acid, and extract of henna leaves or, as it is sometimes called, hennotannic acid. 2008 Res. Jrnl. Agric. & Biol. Sci. 4 784 The leaves, flowers and seeds [of Cassia alata] have been reported to contain high levels of anthraquinones, crysophanic, napthoquonine, or hennotannic acids. This entry has been updated (OED Third Edition, December 2019; most recently modified version published online March 2022). < adj.1863
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