“Psychedelics are an extremely good way of teaching you how to think outside the box.” The Economist’s 1843 magazine meets the techies breakfasting on acid
A psychedelic drug or classical hallucinogen is a substance whose primary action is to alter cognition and perception, typically as a serotonin receptor agonist, causing thought and visual/auditory changes, and heightened state of consciousness. Major psychedelic drugs include LSD, mescaline (peyote's active ingredient), DMT and hallucinogenic mushrooms.
Origin of term
The term psychedelic is derived from the Greek words ψυχή (psyche, "soul, mind") and δηλείν (delein, "to manifest"), hence "soul-manifesting", the implication being that psychedelics can access the soul and develop unused potentials of the human mind. The word was coined in 1956 by British psychiatrist, Humphry Osmond, the spelling loathed by American ethnobotanist, Richard Schultes, but championed by the American psychologist, Timothy Leary.
Aldous Huxley had suggested to Humphry Osmond in 1956 his own coinage phanerothyme (Greek "phaneroein-" visible + Greek "thymos" soul, thus "visible soul"). Recently, the term entheogenic has come into use to denote the use of psychedelic drugs in a religious/spiritual/mystical context.