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[pahy-ruh-gal-awl, -ol, -guh-lawl, -lol] /ˌpaɪ rəˈgæl ɔl, -ɒl, -gəˈlɔl, -ˈlɒl/
a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C 6 H 3 (OH) 3 , obtained by heating gallic acid and water: used chiefly as a developer in photography, as a mordant for wool, in dyeing, and in medicine in the treatment of certain skin conditions.
Also called pyrogallic acid.
Origin of pyrogallol
First recorded in 1875-80; pyro- + gall(ic)2 + -ol1
Related forms
[pahy-ruh-gal-ik, -gaw-lik] /ˌpaɪ rəˈgæl ɪk, -ˈgɔ lɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for pyrogallol
Historical Examples
  • Tanning materials are divided into two main classes: pyrogallol, Catechol.

    Leather K. J. Adcock
  • Sumach is the other pyrogallol tan of commercial importance.

    Animal Proteins Hugh Garner Bennett
  • The pyrogallol method of Preisz also proved to be unreliable in his hands.

    Contagious Abortion of Cows Ward J. MacNeal
  • The light from ozone acting on pyrogallol solution is especially bright under certain conditions.

    The Nature of Animal Light E. Newton Harvey
  • This is especially well seen in the action of various oxidizers on pyrogallol and H2O2 recorded in Table 10.

    The Nature of Animal Light E. Newton Harvey
  • Thus the "maximum luminescence pressure" of pyrogallol increases with increase of temperature.

    The Nature of Animal Light E. Newton Harvey
  • Table 10 shows the relation between temperature and intensity of luminescence with pyrogallol and various oxidizers.

    The Nature of Animal Light E. Newton Harvey
  • Esculin will not luminesce with peroxidase and H2O2, but pyrogallol or gallic acid will.

    The Nature of Animal Light E. Newton Harvey
  • It is the only pyrogallol tannin which does not deposit bloom, or ellagic acid, on the leather.

    Leather K. J. Adcock
  • Myrabolans is one of the most important of the pyrogallol tanning materials.

    Animal Proteins Hugh Garner Bennett
British Dictionary definitions for pyrogallol


a white lustrous crystalline soluble phenol with weakly acidic properties; 1,2,3-trihydroxybenzene: used as a photographic developer and for absorbing oxygen. Formula: C6H3(OH)3
Derived Forms
pyrogallic, adjective
Word Origin
C20: from pyro- + gall(ic)² +-ol1
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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pyrogallol in Medicine

pyrogallol py·ro·gal·lol (pī'rō-gāl'ôl', -ōl', -gô'lôl', -lōl')
A white, toxic crystalline phenol used as a photographic developer and to treat certain skin diseases. Also called pyrogallic acid.

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