from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A six-membered heterocyclic compound, such as pyridine, that contains one or more atoms of nitrogen with a ring structure resembling that of benzene.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a class of organic compounds, having the general formula R2C=NN=CR2, produced by the action of a carbonyl compound with hydrazine.
Sorry, no etymologies found.