- 1an ancient text in the form of a book
- 2an official list of medicines or chemicals
codex
nounNAmE//ˈkoʊdɛks//
(pl. codices NAmE//ˈkoʊdəsiz//, NAmE//ˈkɑdəsiz//
or codexes)Check pronunciation: codex
Definition of codex noun from the Oxford Advanced American Dictionary