from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A crystalline substance closely related to xanthin, present in small quantities in urine.
from the GNU version of the Collaborative International Dictionary of English
- n. A crystalline substance closely related to xanthin, present in small quantity in urine.
from The Century Dictionary and Cyclopedia
- n. A poisonous crystalline base, 1, 7-dimethylxanthin, C7H8O2N4, which occurs in human urine. It can be made from theobromine and changed into caffein. It melts at 284° C.
para- + xanthin (Wiktionary)