Source : Webster's Revised Unabridged Dictionary (1913)

Coerulignone \C[oe]`ru*lig"none\, n. [L. coeruleus cerulean +
   lignum wood + E. quinone.] (Chem.)
   A bluish violet, crystalline substance obtained in the
   purification of crude wood vinegar. It is regarded as a
   complex quinone derivative of diphenyl; -- called also
   {cedriret}.