Yes, TUBERCULAR is a Scrabble word!

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

Is it a valid word?

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

characterized by the presence of tuberculosis lesions or tubercles
pertaining to or of the nature of a normal tuberosity or tubercle
relating to tuberculosis or those suffering from it
constituting or afflicted with or caused by tuberculosis or the tubercle bacillus