They pulled a Golden Compass on us
Like the Philip Pullman "His Dark Materials" adaptation made by Hollywood, they used a fake book title to describe one of the Dust objects in the movie's title, yet used a more elaborate name for the device itself, as in:
Golden Compass = Alethiometer, and
Dial of Destiny = Antikythera something or other.
I suppose they have to dumb down movies like this for dumb audiences. The Harry Potter thing was another one: Philosopher's Stone makes sense, Sorcerer's Stone does not.