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.
Psychology Today reported last summer that national research shows recreational hallucinogen usage is up among teens even as alcohol, marijuana and tobacco use have been dropping. Don Stacom, Hartford Courant, 26 Feb. 2026 Jorge Fernández/LightRocket via Getty Images Ibogaine, a hallucinogen made from the root bark of a West African shrub named iboga, is said to have healing properties that have not yet been clinically tested. Logan Smith, CBS News, 2 Feb. 2026 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 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 14 Mar. 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

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