Source : Webster's Revised Unabridged Dictionary (1913)

Orsellic \Or*sel"lic\, a. [From F. orseille archil. See
   {Archil}.] (Chem.)
   Pertaining to, or designating, an acid found in certain
   lichens, and called also lecanoric acid. [Formerly written
   also {orseillic}.]