silencer

silencer is a   Noun

Definition:

[1] The muffler of an internal-combustion engine.

[2] Any of various devices to silence the humming noise of telegraph wires.

[3] A device for silencing the report of a firearm shooting its projectiles singly, as a tubular attachment for the muzzle having circular plates that permit the passage of the projectile but impart a rotary motion to, and thus retard, the exploding gases.

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