- Main Entry:
- co·deine

- Pronunciation:
-
\ˈkō-ˌdēn\
- Function:
- noun
- Etymology:
- French codéine, from Greek kōdeia poppyhead
- Date:
- 1850
: a morphine derivative C18H21NO3·H2O that is found in opium, is weaker in action than morphine, and is used especially as an analgesic and antitussive