The Collaborative International Dictionary of English v.0.48:

Cloche \Cloche\, n. [F., prop., bell.] (A["e]ronautics)
   An apparatus used in controlling certain kinds of
   a["e]roplanes, and consisting principally of a steering
   column mounted with a universal joint at the base, which is
   bellshaped and has attached to it the cables for controlling
   the wing-warping devices, elevator planes, and the like.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

cloche \cloche\ n.
   1. a woman's close-fitting helmetlike hat.
      [WordNet 1.5]

   2. a low transparent cover put over young plants to protect
      them from cold.
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

cloche
    n 1: a low transparent cover put over young plants to protect
         them from cold
    2: a woman's close-fitting hat that resembles a helmet