— pyrogallic /puy'reuh gal"ik, -gaw"lik/ , adj.
/puy'reuh gal"awl, -ol, -geuh lawl", -lol"/ , n.
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 .
[ 1875-80; PYRO- + GALL(IC) 2 + -OL 1 ]