Yes, LOXODROMES is a Scrabble word!

Letter values in Scrabble US: L 1, O 1, X 8, O 1, D 2, R 1, O 1, M 3, E 1, S 1.

Is it a valid word?

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

a line on a sphere that cuts all meridians at the same angle; the path taken by a ship or plane that maintains a constant compass direction

Also: rhumb line.