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psychedelic

adjective

  1. of or causing extreme changes in the conscious mind, as hallucinations, delusions, intensification of awareness and sensory perception, etc.
  2. of or associated with psychedelic drugs; specif., simulating the auditory or visual effects of the psychedelic state
  3. designating any of various fluorescent colors popularized during the 1960s

noun

a psychedelic drug

Related Forms:

See psychedelic in American Heritage Dictionary 4

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