DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Rimmer \Rim"mer\, n.
      An implement for cutting, trimming, or ornamenting the rim of
      anything, as the edges of pies, etc.; also, a reamer.
      --Knight.
      [1913 Webster]