psy·che·del·ic [ skə déllik ]
adjective
1. relating to hallucinogenic drugs: used to describe, or relating to or caused by, drugs that generate hallucinations, abnormal psychic states, or states that resemble psychiatric disorders
2. overloading the senses: weird, distorted, wildly colorful, or otherwise resembling images or sounds experienced by somebody under the influence of a psychedelic drug
noun (plural psychedelics)