DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Cursor \Cur"sor\ (k?r"s?r), n. [L., a runner. See Cursitor.]
      Any part of a mathematical instrument that moves or slides
      backward and forward upon another part.
      [1913 Webster]