Psychedelic rock, style of rock music popular in the late 1960s that was largely inspired by hallucinogens, or so-called âmind-expandingâ drugs such as marijuana and LSD (lysergic acid diethylamide; âacidâ), and that reflected drug-induced states through the use of feedback, electronics, and intense volume.
Source: Top 10 Psychedelic Rock Revival Bands You Should Experience Right Now (from Ultimate-Guitar.com).