Is “Codex” a Scrabble word?
Yes
CODEX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Codex
/ˈkəʊdɛks/
noun
1.An early manuscript book.
2.A book bound in the modern manner, by joining pages, as opposed to a rolled scroll.
3.An official list of medicines and medicinal ingredients.