Silencer

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Silencer

(n.) One that silences;
(n.) The muffler of an internal-combustion engine.
(n.) Any of various devices to silence the humming noise of telegraph wires.
(n.) 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.