nozzle

A short tube, usually tapering, forming the vent of a hose or pipe.

A short outlet or inlet pipe projecting from the end or side of a hollow vessel, as a steam-engine cylinder or a steam boiler.

The nose of an animal; muzzle.

• At length the acme of a typical Mexican scene was reached when the burros unceremoniously raised their nozzles and brayed loud and long.

The part of an earbud that accommodates eartips.

• The shape of the nozzle prevents the use of aftermarket eartips.