Nozzle

A nozzle is a device that takes incoming fluid (such as gas or liquid) and increases the speed. This is done by changing the size of the pipe (or tube) that the fluid is flowing through.

 Origine of American vectoring-nozzle 
Soyuz R-79V-300 - Origine of the F135. - on Lockheed Martin Official Web Magazine - on AMNTK Soyuz Official News

References

Category:Fluid mechanics