from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A diazine in which the two nitrogen atoms are in the para- positions; many of its derivatives are pharmaceuticals.
from the GNU version of the Collaborative International Dictionary of English
- A feebly basic solid, C4H4N2, obtained by distilling piperazine with zinc dust, and in other ways. Also, by extension, any of various derivatives of the same.
Sorry, no etymologies found.