Yes, CATENAE is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, T 1, E 1, N 1, A 1, E 1.

Is it a valid word?

CATENAE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a chain of connected ideas or passages or objects so arranged that each member is closely related to the preceding and following members (especially a series of patristic comments elucidating Christian dogma)