A projecting part with an opening, as at the end of a hose, for regulating and directing a flow of fluid.
A spout at the end of a hose, pipe, bellows, etc., by which a stream of liquid or gas may be directed and controlled.
The human nose.
An orifice in an inkjet print head through which ink is sprayed onto the paper. Print heads with six thousand or more nozzles are common in today's printers.
Origin of nozzle
Middle English noselle socket on a candlestick diminutive of nose nose