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English definition of “psychedelic”

psychedelic

adjective  /ˌsɑɪ·kɪˈdel·ɪk/ us  
causing unusually strong experiences of color, sound, smell, taste, and touch, and other mental effects such as feelings of deep understanding or hallucination (= imagining things that do not exist) Psychedelic also means likely to produce a strong effect because of having bright colors or patterns.
(Definition of psychedelic from the Cambridge Academic Content Dictionary © Cambridge University Press)
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