P0688000 (pī′rō-găl′ôl′, -ōl′, -ŏl′, -gô′lôl′, -lōl′, -lŏl′)n. A white, toxic crystalline phenol, C6H3(OH)3, used as a photographic developer and to treat certain skin diseases. Also called pyrogallic acid.[pyro- + gall(ic acid) + -ol.]py′ro·gal′lic(-găl′ĭk, -gô′lĭk) adj.Thesaurus