Definition of "hallucinogen" [hal•lu•ci•no•gen]

• A substance that induces hallucination. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Niopo turned out to be a snuff derived from Anadenthera peregrina, a tree of the open grasslands first described as a hallucinogen by Humboldt."
• "It appeared the hallucinogen, which is sometimes known on the street as "Europa" and has no approved medical use, was legally ordered over the Internet for a spring break party, said Anoka County Sheriff Commander Paul Sommer."
• "All the evidence agrees with anthropological research which traces the development of the sense of the sacred, and therefore the birth of religion, to the use of a hallucinogen, which is often a mushroom (the Mexican Psilocybe; the Amanita Muscaria of the Hyperboreans, ancestors of the Europeans; the Soma of the Veda Indians; the Ergot of the Mysteries of Eleusis; the Boletus of the Kuma)."