n. Any device that attenuates a signal, but especially an electronic device that reduces the amplitude of a signal
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an electrical device for attenuating the strength of an electrical signal
Word Usage
"The victim is an attenuator not an aerial, like a piece of meat in a microwave oven the frequency of which is chosen to be one well absorbed by water and fat."