The Collaborative International Dictionary of English v.0.48:

magic trick \magic trick\ n.
   An feat of illusion performed by an illusionist, which
   appears magical to naive observers.

   Syn: conjuring trick, trick, magic, legerdemain, illusion,
        deception.
        [WordNet 1.5] Magilp

WordNet (r) 3.0 (2006):

magic trick
    n 1: an illusory feat; considered magical by naive observers
         [syn: magic trick, conjuring trick, trick, magic,
         legerdemain, conjuration, thaumaturgy, illusion,
         deception]