IPA: //ˌpaɪrəˈɡælɒl//
KK: /ˈpaɪrəˌɡæləl/
A toxic white crystalline substance used in photography and to treat some skin conditions.
Pyrogallol is often used as a developer in black and white photography.
Pyrogallol is formed from "pyro-" (from Greek 'pur', meaning fire) and "gallol" (derived from 'gall', referring to tannic acid or gall nuts). The term refers to a compound related to fire and gall, often used in chemical applications.
Think of 'fire' ('pyro-') and 'gall' (from gall nuts) to remember that pyrogallol is a compound associated with these elements.