string insulator

16 LETTERS · STARTS WITH S

string insulator is a valid 16-letter word worth 16 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1T1R1I1N1G2I1N1S1U1L1A1T1O1R1

1 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =16 PTS

DOUBLE WORD → 32TRIPLE WORD → 48

MEANING

What does string insulator mean?