from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A narcotic drug, C18H21NO3, derived from morphine and used in the form of its hydrochloride as an analgesic.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An opiate analogue, a methylated derivative of hydromorphone used as an analgesic.
met(hyldihydr)o(mor)p(hin)on(e).(American Heritage® Dictionary of the English Language, Fourth Edition)