overhead work

from The Collaborative International Dictionary of English v.0.48

Overhead \O`ver*head"\, adv.
   Aloft; above; in or attached to the ceiling or roof; in the
   story or upon the floor above; in the zenith.
   [1913 Webster]

         While overhead the moon
         Sits arbitress.                          --Milton.
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   Note: Also used adjectively; as, an overhead crane, gear,
         etc.
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   {Overhead engine}, a vertical steam engine in which the
      cylinder stands above the crank.

   {Overhead work}, a general term in manufactories for
      countershafting and gearing, when overhead.
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