from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several compounds with composition C2H3N3, having a five-membered ring of two carbon atoms and three nitrogen atoms.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. either of two isomeric heterocyclic compounds having a five-membered ring with three nitrogen atoms and two double bonds in the ring; any organic derivative of these compounds
from The Century Dictionary and Cyclopedia
- n. A class-name applied, in organic chemistry, to compounds containing in their molecule a cyclic group consisting of three nitrogen and two carbon atoms, such as Various arrangements of these atoms are possible.
Sorry, no etymologies found.