Yes, POUNDAL is a Scrabble word!

Letter values in Scrabble US: P 3, O 1, U 1, N 1, D 2, A 1, L 1.

Is it a valid word?

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

a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound; equal to 0.1382 newtons

Not playable in Scrabble US: PDL.