[huh-loo-suh-nuh-juh n]
See more synonyms for hallucinogen on Thesaurus.com

Origin of hallucinogen

First recorded in 1950–55; hallucin(ation) + -o- + -gen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for hallucinogen

dope, potion, opiate, poison, narcotic

Examples from the Web for hallucinogen

Contemporary Examples of hallucinogen

British Dictionary definitions for hallucinogen


  1. any drug, such as LSD or mescaline, that induces hallucinations
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hallucinogen

"drug which induces hallucinations," 1954, from stem of hallucination + -gen.

Online Etymology Dictionary, © 2010 Douglas Harper

hallucinogen in Medicine


  1. A substance that induces hallucination.
Related formshal•lu′cin•o•genic (-jĕnĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

hallucinogen in Science


  1. A drug or chemical that causes a person to have hallucinations. Mescaline, LSD, and psilocybin are hallucinogens.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hallucinogen in Culture



A substance or drug that can cause hallucinations.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.