psychedelic : Idioms & Phrases
psychedelic drug
- 
       noun a psychoactive drug that induces hallucinations or altered sensory experiences
       
       
 psychodelic drug; hallucinogen; hallucinogenic drug.
 
WordNet
psychedelic rock
- 
       noun a musical style that emerged in the 1960s; rock music inspired by or related to drug-induced experience
       
       
 acid rock.