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psychedelic (adj.)

occasionally psychodelic, "producing expanded consciousness through heightened awareness and feeling," 1956, of drugs, suggested by British-born Canadian psychiatrist Humphry Osmond in a letter to Aldous Huxley and used by Osmond in a scientific paper published the next year; from Greek psykhē "mind" (see psyche) + dēloun "make visible, reveal" (from dēlos "visible, clear," from PIE root *dyeu- "to shine").

In popular use from 1965 with reference to anything producing effects or sensations similar to the common perception of the effects of a psychedelic drug. As a noun, "a psychedelic drug," from 1956.

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Definitions of psychedelic from WordNet

psychedelic (adj.)
producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis;
psychedelic drugs like psilocybin and mescaline
psychedelic (adj.)
having the vivid colors and bizarre patterns associated with psychedelic states;
a psychedelic painting
psychedelic (adj.)
(of a mental state) characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair;
a psychedelic experience
From wordnet.princeton.edu