The Collaborative International Dictionary of English v.0.48:

parapsychological \parapsychological\ adj.
   Of or pertaining to parapsychology; pertaining to forces or
   mental processes outside the possibilities defined by natural
   or scientific laws; as, parapsychological research.

   Syn: psychic, psychical, parapsycholological, paranormal.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

parapsychological
    adj 1: beyond normal physical explanation