|a psychoactive drug that induces hallucinations or altered sensory experiences [syn: hallucinogen]|
any of the so-called mind-expanding drugs that are able to induce states of altered perception and thought, frequently with heightened awareness of sensory input but with diminished control over what is being experienced. See also hallucinogen.
Learn more about psychedelic drug with a free trial on Britannica.com.
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|