hydroquinone

[hahy-droh-kwi-nohn, -druh-kwin-ohn]
noun Chemistry.
  1. a white, crystalline compound, C6H6O2, formed by the reduction of quinone: used chiefly in photography and to inhibit autoxidation reactions.

Origin of hydroquinone

First recorded in 1860–65; hydro-1 + quinone
Also called hy·dro·quin·ol [hahy-druh-kwin-awl, -ol] /ˌhaɪ drəˈkwɪn ɔl, -ɒl/, quinol.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hydroquinone

hydroquinone

hydroquinol (ˌhaɪdrəʊˈkwɪnɒl)

noun
  1. a white crystalline soluble phenol used as a photographic developer; 1,4-dihydroxybenzene. Formula: C 6 H 4 (OH) 2Also called: quinol
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

hydroquinone in Medicine

hydroquinone

[hī′drō-kwĭ-nōn, -kwĭnōn′]
n.
  1. A white crystalline compound used as an antioxidant, a stabilizer, and a reagent.hydroquinol
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.