DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   incantation
    n.
       Any particularly arbitrary or obscure command that one must mutter at a
       system to attain a desired result. Not used of passwords or other explicit
       security features. Especially used of tricks that are so poorly documented
       that they must be learned from a wizard. “This compiler normally locates
       initialized data in the data segment, but if you mutter the right
       incantation they will be forced into text space.”