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The Collaborative International Dictionary
pyrocatechin

Oxyphenol \Ox`y*phe"nol\, n. (Chem.) A phenol, C6H4(OH)2, produced by the distillation of catechin; called also oxyphenic acid, and now pyrocatechin.

Wiktionary
pyrocatechin

n. (context obsolete organic compound English) pyrocatechol