I. ¦sīkə¦delik also -dēl- noun
( -s )
1. : a psychedelic drug (as LSD)
2.
a. : a user or an advocate of psychedelic drugs
b. : a person with psychedelic social and cultural interests and orientation
II. adjective
Etymology: irregular from Greek psychē soul + dēloun to show, reveal (from dēlos evident) + English -ic — more at psyche adel-
1.
a. : of, relating to, or being drugs (as LSD) capable of producing abnormal psychic effects (as hallucinations) and sometimes psychic states resembling mental illness
b. : produced by or associated with the use of psychedelic drugs
a psychedelic experience
2.
a. : imitating, suggesting, or reproducing the effects (as distorted or bizarre images or sounds) of psychedelic drugs
psychedelic art
b.
(1) : very bright in color
ferryboats soon will take on a psychedelic look, with an overall coat of international orange and touches of red and yellow — New York Times
(2) of colors : fluorescent
3. : of or relating to the culture associated with psychedelic drugs
a year ago we couldn't even begin to sell '60s psychedelic stuff — Paul Glynn
• psy·che·del·i·cal·ly -lə̇k(ə)lē adverb