parallel motion

15 LETTERS · STARTS WITH P

parallel motion is a valid 15-letter word worth 18 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3A1R1A1L1L1E1L1M3O1T1I1O1N1

3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does parallel motion mean?