Xylorcin n. : A derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red; -- called also betaorcin.

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Taxonomy
xylene, Dictionary, Xy, lor, orcin, Chem, derivative, crystalline substance, exposure, Unanswered questions, Webster 1913, Search, Patrick J. Cassidy, Company, Press Room, Privacy Policy, IP Issues, Xyl.

Defination from the web:
... xylorcin. Dictionary: Xy·lor·cin. Home > Library > Literature & Language > Webster 1913. n. [Xylene + orcin. ...