inversion center

16 LETTERS · STARTS WITH I

inversion center is a valid 16-letter word worth 20 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1V4E1R1S1I1O1N1C3E1N1T1E1R1

1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =20 PTS

DOUBLE WORD → 40TRIPLE WORD → 60

MEANING

What does inversion center mean?