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alizarin

[uh-liz-er-in] /əˈlɪz ər ɪn/
noun, Chemistry
1.
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] /əˈlɪz ər ɪn, -əˌrin/ (Show IPA)
.
Origin
1825-1835
1825-35; < French alizarine, equivalent to alizar(i) (< Spanish < Arabic al the + ʿaṣārah juice) + -ine -ine1
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for alizarine

alizarin

/əˈlɪzərɪn/
noun
1.
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
Word Origin
C19: probably from French alizarine, probably from Arabic al-’asārah the juice, from ’asara to squeeze
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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alizarine in Medicine

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 Article for alizarine

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.

Learn more about alizarin with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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