Adjective
1. producing distorted sensory perceptions and feelings or altered states of awareness or sometimes states resembling psychosis;
"psychedelic drugs like psilocybin and mescaline"2. having the vivid colors and bizarre patterns associated with psychedelic states;
"a psychedelic painting"3. of a mental state characterized by intense and distorted perceptions and hallucinations and feelings of euphoria or sometimes despair;
"a psychedelic experience"