nozzle
Pronunciation:
/ˈnɒzəl/noun
Definitions
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.
The part of an earbud that accomodates eartips.
Example: The shape of the nozzle prevents the use of aftermarket eartips.