ˌpīrōˈgaˌlȯl, -ˌlōl noun
( -s )
Etymology: International Scientific Vocabulary pyrogall ic + -ol
: a poisonous bitter crystalline phenol C 6 H 3 (OH) 3 with weak acid properties that is obtained usually by pyrolysis of gallic acid with water and is used chiefly as a photographic developer, in alkaline solution as an absorbent for oxygen in gas analysis, in making dyes and in dyeing, and in medicine in treating skin diseases; 1,2,3-trihydroxy-benzene