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[in-dok-sil] /ɪnˈdɒk sɪl/
noun, Chemistry.
a crystalline compound, C 8 H 7 NO, that is obtained by the hydrolysis of indican and is readily oxidized to furnish indigo.
Origin of indoxyl
1885-90; ind- + (hydr)oxyl Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for indoxyl
Historical Examples
  • Indol is absorbed and oxidized into indoxyl, which combines with potassium and sulphuric acid and is thus excreted.

    A Manual of Clinical Diagnosis James Campbell Todd
British Dictionary definitions for indoxyl


a yellow water-soluble crystalline compound occurring in woad as its glucoside and in urine as its ester. Formula: C8H7NO See also indican
Word Origin
C19: from indigo + hydroxyl
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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indoxyl in Medicine

indoxyl in·dox·yl (ĭn-dŏk'səl)
A product of intestinal bacterial degradation of indoleacetic acid, excreted in the urine.

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