hallucinogen

noun

hal·​lu·​ci·​no·​gen hə-ˈlü-sə-nə-jən How to pronounce hallucinogen (audio)
: a substance that induces hallucinations
hallucinogenic adjective or noun

Examples of hallucinogen in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
How about a fun one, micro-dosing of hallucinogens? Will Carless, USA Today, 22 Jan. 2026 However, certain drugs — like methamphetamines, hallucinogens and synthetic cannabinoids — can cause psychosis. Cara Lynn Shultz, PEOPLE, 23 Dec. 2025 His attorneys said Emerson had hallucinogen persisting perception disorder, which made the effects of the psychedelic drug last for days instead of hours. Alex Sundby, CBS News, 17 Nov. 2025 Unlike psychedelics or other hallucinogens, there’s no real potential for a good trip on a deliriant. Fin Carter, Wired News, 17 Nov. 2025 See All Example Sentences for hallucinogen

Word History

Etymology

hallucination + -o- + -gen

First Known Use

1954, in the meaning defined above

Time Traveler
The first known use of hallucinogen was in 1954

Browse Nearby Words

Cite this Entry

“Hallucinogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hallucinogen. Accessed 27 Jan. 2026.

Kids Definition

hallucinogen

noun
hal·​lu·​ci·​no·​gen hə-ˈlü-sə-nə-jən How to pronounce hallucinogen (audio)
: a drug that causes hallucinations
hallucinogenic adjective

Medical Definition

hallucinogen

noun
hal·​lu·​ci·​no·​gen hə-ˈlüs-ᵊn-ə-jən How to pronounce hallucinogen (audio)
: a substance and especially a drug that induces hallucinations

More from Merriam-Webster on hallucinogen

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