suspension insulator

20 LETTERS · STARTS WITH S

suspension insulator is a valid 20-letter word worth 21 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1U1S1P3E1N1S1I1O1N1I1N1S1U1L1A1T1O1R1

1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does suspension insulator mean?