Thaumaturgy: The practice of magic. Originally "miracle working," from Greek thauma- (miracle) and -ourgos (working).
I discovered "thaumaturgy"--undefined but clear in context--in Alex Stone's "The Magic Olympics: With Tricks Explained!" in the July Harper's, a long essay about the author's attempt to win the 23rd World Championships of Magic. (Access restricted to subscribers.) Among the thaumaturgic devices Stone divulges is the topit, "a secret pocket sewn into the lining of a coat, an old pickpocket's tool (the 'poacher's pouch') repurposed by mid-twentieth-century magicians."
Here's a partial list of some famous moves in Stone's specialty, sleight-of-hand close-up magic:
Green angle separation
A few years ago I had the honor of sitting across the table in a San Fernando Valley deli from Tony Giorgio, a master of close-up sleight-of-hand. (He's married to my high school Spanish teacher, who is the hippest gal I've ever known. Movie buffs may recognize Tony's name: he played Bruno Tattaglia in The Godfather.) Tony produced a deck of cards and began to put them through their paces. Ladies and gentleman, I am here to tell you that I was at no time more than eight inches away from Tony's fingers and I have absolutely no clue how he did the things he did. A thaumaturge of the first order.
Bonus link: a brief glossary of magic terms.