reentering polygon

NOUN
18 LETTERS · STARTS WITH R

reentering polygon is a valid 18-letter word worth 24 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1E1E1N1T1E1R1I1N1G2P3O1L1Y4G2O1N1
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 4 + 2 + 1 + 1 =24 PTS
DOUBLE WORD → 48TRIPLE WORD → 72
MEANING

What does reentering polygon mean?

NOUN · 1 SENSE
1

A polygon with one or more reentrant angles.