Yes, TRABECULAE is a Scrabble word!

Letter values in Scrabble US: T 1, R 1, A 1, B 3, E 1, C 3, U 1, L 1, A 1, E 1.

Is it a valid word?

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

rod-shaped structures of fibrous tissue that divide an organ into parts (as in the penis) or stabilize the structure of an organ (as in the spleen)