An Etymological Dictionary of Astronomy and Astrophysics

1. Tha end part of a → pipe, → hose, or → tube through which a → stream of → fluid is directed.
   

2. A part in a → rocket → engine that accelerates the exhaust gases from the combustion chamber to a high → velocity.

Etymology (EN): M.E. noselle, diminutive of → nose.

Etymology (PE): Kalap “the beak of a bird” (Biruni, at-Tafhim), may be from *galap-, ultimately from Proto-Ir. *ui-lap-; cf. Mid.Pers. lap “lip,” Mod.Pers. lab cognate with L. labium, E. lip.