The Collaborative International Dictionary of English v.0.48:

Hallucinatory \Hal*lu"ci*na*to*ry\ (-n[.a]*t[-o]*r[y^]), a.
   Partaking of, having the character of, or tending to produce,
   hallucinations; as, hallucinatory visions.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

hallucinatory
    adj 1: characterized by or characteristic of hallucination ;
           "the bizarre hallucinatory dreams of fever"- Jean
           Stafford

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "hallucinatory":
   beguiling, catchy, consciousness-expanding, deceiving, deceptive,
   delusive, delusory, dubious, fallacious, false, fishy,
   hallucinational, hallucinative, hallucinogenic, illusive, illusory,
   mind-blowing, mind-expanding, misleading, psychedelic,
   questionable, trickish, tricksy, tricky