codex

Etymology

From Latin cōdex, variant form of caudex (“tree trunk, book, notebook”); compare caudex (in botany). Doublet of code.

noun

1. An early manuscript book.
2. A book bound in the modern manner, by joining pages, as opposed to a rolled scroll.
   From its inception, the index has provided a window onto the history of the book, for it took the advent of a particular type of book — the codex, a sheaf of pages fastened along one edge — to make an index a practical possibility. 2022-02-15, Margalit Fox, “Look It Up? Only if You’re Dishonest and Ignorant”, in The New York Times, →ISSN
3. An official list of medicines and medicinal ingredients.