| pyrogallic | <chemistry> Pertaining to, derived from, or designating, an acid called pyrogallol. See Pyrogallol. Origin: Pyro- + gallic. Source: Websters Dictionary (01 Mar 1998) |
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| pyrogallic acid | <chemistry> A phenol metameric with phloroglucin, obtained by the distillation of gallic acid as a poisonous white crystalline substance having acid properties, and hence called also pyrogallic acid. It is a strong reducer, and is used as a developer in photography and in the production of certain dyes. Origin: Pyrogallic + -ol. Source: Websters Dictionary (01 Mar 1998) |