post insulator

14 LETTERS · STARTS WITH P

post insulator is a valid 14-letter word worth 15 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3O1S1T1I1N1S1U1L1A1T1O1R1
3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does post insulator mean?

1