ETYM A dim. of nose.
1. A projecting spout from which a fluid is discharged; SYN. nose.
2. A projecting vent of something.
3. A short tube with a taper or constriction used (as on a hose) to speed up or direct a flow of fluid.
4. A part in a rocket engine that accelerates the exhaust gases from the combustion chamber to a high velocity.