codex
Pronunciation: /ˈkəʊdɛks/
noun ( plural codices /ˈkəʊdɪsiːz, ˈkɒd-/ or codexes)

Origin:
late 16th century (denoting a collection of statutes): from Latin, literally 'block of wood', later denoting a block split into leaves or tablets for writing on, hence a book