tangential motion

17 LETTERS · STARTS WITH T

tangential motion is a valid 17-letter word worth 19 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1A1N1G2E1N1T1I1A1L1M3O1T1I1O1N1

1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does tangential motion mean?