inversion point

15 LETTERS · STARTS WITH I

inversion point is a valid 15-letter word worth 19 points in Scrabble and 24 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1V4E1R1S1I1O1N1P3O1I1N1T1

1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does inversion point mean?