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.