Usnic

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Usnic \Us"nic\, a. (Chem.)
     Pertaining to, or designating, a complex acid obtained, as a
     yellow crystalline substance, from certain genera of lichens
     ({Usnea}, {Parmelia}, etc.).
     [1913 Webster]