[ in-dok-sil ]
/ ɪnˈdɒk sɪl /

noun Chemistry.

a crystalline compound, C8H7NO, that is obtained by the hydrolysis of indican and is readily oxidized to furnish indigo.

Origin of indoxyl

First recorded in 1885–90; ind- + (hydr)oxyl Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for indoxyl

  • 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


/ (ɪnˈdɒksɪl) /


a yellow water-soluble crystalline compound occurring in woad as its glucoside and in urine as its ester. Formula: C 8 H 7 NOSee also indican

Word Origin for indoxyl

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

Medicine definitions for indoxyl


[ ĭn-dŏksəl ]


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.