slipper shell

from The Collaborative International Dictionary of English v.0.48
Slipper \Slip"per\, n.
   1. One who, or that which, slips.
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   2. A kind of light shoe, which may be slipped on with ease,
      and worn in undress; a slipshoe.
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   3. A kind of apron or pinafore for children.
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   4. A kind of brake or shoe for a wagon wheel.
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   5. (Mach.) A piece, usually a plate, applied to a sliding
      piece, to receive wear and afford a means of adjustment;
      -- also called {shoe}, and {gib}.
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   {Slipper animalcule} (Zool.), a ciliated infusorian of the
      genus {Paramecium}.

   {Slipper flower}.(Bot.) Slipperwort.

   {Slipper limpet}, or {Slipper shell} (Zool.), a boat shell.
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