'orsellic acid' definitions:

Definition of 'orsellic acid'

From: GCIDE

Lecanoric \Lec`a*no"ric\, a. (Chem.) Pertaining to, or designating, an organic acid which is obtained from several varieties of lichen (Lecanora, Roccella, etc.), as a white, crystalline substance, and is called also orsellic acid, diorsellinic acid, lecanorin, etc. [1913 Webster]