DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Ravehook \Rave"hook\ (r[=a]v"h[oo^]k), n. (Shipbuilding)
      A tool, hooked at the end, for enlarging or clearing seams
      for the reception of oakum.
      [1913 Webster]