muzzle

The protruding part of an animal's head which includes the nose, mouth and jaws.

(slang, derogatory, by extension) A person's mouth.

A device used to prevent an animal from biting or eating, which is worn on its snout.

(firearms) The mouth or the end for entrance or discharge of a gun, pistol etc., that the bullet emerges from.

(chiefly Scotland) A piece of the forward end of the plow-beam by which the traces are attached.

(obsolete, historical) An openwork covering for the nose, used for the defense of the horse, and forming part of the bards in the 15th and 16th centuries.