GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Planer (?), n.
   1. One who, or that which, planes; a planing machine; esp., a machine for planing wood or metals.
   
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   2. (Print.) A wooden block used for forcing down the type in a form, and making the surface even.  Hansard.
   
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   Planer centers. See under Center.
   
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