INSULATOR

noun
9 Scrabble
12 WWF
I 1
N 1
S 1
U 1
L 1
A 1
T 1
O 1
R 1

Definition

A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).

"To isolate electrical wires from the pylons supporting them, one often uses glass insulators."

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