What is the definition or description of: purine?

Base in DNA and RNA. Purine is one of the two classes of bases in dna and rna. The purine bases are adenine and guanine. Uric acid is a purine end -product. Uric acid is the offending substance in gout.
A nitrogenous base. They are aromatic compounds found in the genetic information in all living organisms on earth. They, along with pyrimidines, make up the 2 groups of nitrogenous bases found in dna and rna.