pyrogallol
noun
py·ro·gal·lol ˌpī-rō-ˈga-ˌlȯl 
-ˌlōl;
-ˈgȯ- : a poisonous bitter crystalline phenol C6H6O3 with weak acid properties that is usually obtained by pyrolysis of gallic acid and used especially as a mild reducing agent (as in photographic developing)
Word History
Etymology
International Scientific Vocabulary pyro- + gallic (acid) + -ol entry 1
First Known Use
1868, in the meaning defined above
Medical Definition
pyrogallol
noun
py·ro·gal·lol -ˈgal-ˌȯl -ˌōl; -ˈgȯ-ˌlȯl -ˌlōl
-ˌōl; -ˈgȯ-ˌlȯl -ˌlōl : a poisonous crystalline phenol C6H6O3 formerly used as a topical antimicrobial (as in the treatment of psoriasis)
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