Yes, SPRINGTAIL is a Scrabble word!

Letter values in Scrabble US: S 1, P 3, R 1, I 1, N 1, G 2, T 1, A 1, I 1, L 1.

Is it a valid word?

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

any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or water