alizarin

[uh-liz-er-in]
noun Chemistry.
a solid appearing reddish-orange as crystals and brownish-yellow as powder, C 14 H 8 O 4 , one of the earliest known dyes, formerly obtained in its natural state from madder and now derived from anthraquinone: used chiefly in the synthesis of other dyes.
Also, alizarine [uh-liz-er-in, -uh-reen] .


Origin:
1825–35; < French alizarine, equivalent to alizar(i) (< Spanish < Arabic al the + ʿaṣārah juice) + -ine -ine1

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World English Dictionary
alizarin (əˈlɪzərɪn)
 
n
a brownish-yellow powder or orange-red crystalline solid used as a dye and in the manufacture of other dyes. Formula: C6H4(CO)2C6H2(OH)2
 
[C19: probably from French alizarine, probably from Arabic al-’asārah the juice, from ’asara to squeeze]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

alizarin a·liz·a·rin (ə-lĭz'ər-ĭn)
n.
An orange-red crystalline compound used in making dyes and as an indicator.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

alizarin

a red dye originally obtained from the root of the common madder plant, Rubia tinctorum, in which it occurs combined with the sugars xylose and glucose. The cultivation of madder and the use of its ground root for dyeing by the complicated Turkey red process were known in ancient India, Persia, and Egypt; the use spread to Asia Minor about the 10th century and was introduced into Europe in the 13th.

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Here people specialize in the use of alizarin, indigo, and a range of vegetable colors.
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