The Collaborative International Dictionary of English v.0.48:

Nozzle \Noz"zle\, n. [A dim. of nose. [root]261.] [Written also
   nosle.]
   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]

WordNet (r) 3.0 (2006):

nozzle
    n 1: a projecting spout from which a fluid is discharged [syn:
         nozzle, nose]
    2: informal terms for the nose [syn: beak, honker, hooter,
       nozzle, snoot, snout, schnozzle, schnoz]