DuckCorp Dico

Found one definition

1.                 From en.wiktionary.org:
                   
   
   
                   
                     
   
   ** English
   [en]
   
   *** Noun
   [en-noun]
   
    1. A wedge for expanding the split end of a bolt, cotter, dowel, tenon, or other piece, to fasten the end in a hole or mortise and prevent withdrawal. The wedge abuts on the bottom of the hole and the piece is driven down upon it.
   [en]