
• (a.) Pertaining to, or designating, an acid obtained from the urine of dogs. By decomposition the acid yields a nitrogenous base (called kynurin) and carbonic acid.
Found on 
http://thinkexist.com/dictionary/meaning/kynurenic/
 Ky`nu·ren'ic  adjective
Ky`nu·ren'ic  adjective [ Greek ..., ..., dog + ... urine.] 
 (Physiol. Chem.) Pertaining to, or designating, an acid obtained from the urine of dogs. By decomposition the acid yields a nitrogenous base (called 
 kynurin ) and carbonic acid. [ Written also 
 cynurenic .]
Found on 
http://www.encyclo.co.uk/webster/K/19
  No exact match found.