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.
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 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 15 Feb. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster