Yes, BIOMEDICINE is a Scrabble word!

Letter values in Scrabble US: B 3, I 1, O 1, M 3, E 1, D 2, I 1, C 3, I 1, N 1, E 1.

Is it a valid word?

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

the branch of medical science that applies biological and physiological principles to clinical practice
the branch of medical science that studies the ability of organisms to withstand environmental stress (as in space travel)