psychedelic
adjective /ˌsaɪkəˈdelɪk/
/ˌsaɪkəˈdelɪk/
[usually before noun]- (of drugs) causing the user to see and hear things that are not there or that do not exist (= to hallucinate)
- (of art, music, clothes, etc.) having bright colours, strange sounds, etc. like those that are experienced when taking psychedelic drugs
Word Origin1950s: formed irregularly from psyche + Greek dēlos ‘clear, manifest’ + -ic.