from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A highly toxic chlorinated hydrocarbon, C12H8OCl6, used as an insecticide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A toxic chlorinated polycyclic epoxide sometimes used as a pesticide
en(do)- + (diel)drin.(American Heritage® Dictionary of the English Language, Fourth Edition)