Codex has 3 different meanings across 1 category:
Noun
Noun
1
an official list of chemicals or medicines etc.
"The pharmacist checked the codex to verify that every ingredient in the new medication was safe for children."
2
an unbound manuscript of some ancient classic (as distinguished from a scroll)
"The librarian carefully unfolded the fragile codex, revealing pages from an ancient Greek classic that predated the era of bound books."
3
An early manuscript book.
"The library recently restored a fragile codex containing prayers from the fifth century."
Broader Terms (hypernyms)