Xanthinine

Xan´thi`nine

n.

1.

(Chem.) A complex nitrogenous substance related to urea and uric acid, produced as a white powder; - so called because it forms yellow salts, and because its solution forms a blue fluorescence like quinine.

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.