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 initialised data in the data segment, but if you mutter the right incantation they will be forced into text space."
INCANTATION
Meaning of INCANTATION in English
FOLDOC computer English dictionary. Английский словарь по компьютерам FOLDOC. 2012