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Definition of: pyrogallol
(pī′rə·gal′ōl, -ol, -gə·lōl′, pir′ə-) noun Chem.
A white, crystalline, poisonous compound, C6H3(OH)3, obtained by heating gallic acid: used to reduce silver and mercury salts to a metallic state, as a photographic developer, as a dye, and in certain medical preparations. Also pyrogallic acid. [<PYRO- + GALL(IC) + (PHEN)OL]
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