from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to, or designating, a nitrogenous acid which is obtained by the oxidation of uric acid, as a white crystalline substance (C3N2H2O3); -- also called oxalyl urea.
from The Century Dictionary and Cyclopedia
- Derived from uric acid by transformation.
Sorry, no etymologies found.
On oxidation with nitric acid caffeine gives cholesterophane (dimethyl parabanic acid), but if chlorine water be used as the oxidant, then it yields monomethyl urea and dimethyl alloxan (E. Fischer).