Pyr′o‐cat″e‐chin (?), n. [Pyro- + catechu.] (Chem.) A white crystalline substance, C6H4(OH)2, of the phenol series, found in various plants; — so called because first obtained by distillation of gum catechu. Called also catechol, oxyphenol. etc.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.