From The Collaborative International Dictionary of English v.0.48:

Nozzle \Noz"zle\, n. [A dim. of nose. [root]261.] [Written also
   1. The nose; the snout; hence, the projecting vent of
      anything; as, the nozzle of a bellows.
      [1913 Webster]

   2. Specifically:
      (a) A short tube, usually tapering, forming the vent of a
          hose or pipe.
      (b) 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.
          [1913 Webster]
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