from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A drug, C21H25NO3, used as an antagonist to narcotic drugs.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An opiate derivative used mainly to manage alcoholism.
nal(trexone) + mefene (probably shortening and alteration of methylene).(American Heritage® Dictionary of the English Language, Fourth Edition)