interior polygon

16 LETTERS · STARTS WITH I

interior polygon is a valid 16-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1T1E1R1I1O1R1P3O1L1Y4G2O1N1

1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 4 + 2 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does interior polygon mean?