psilocybin

noun

psi·​lo·​cy·​bin ˌsī-lə-ˈsī-bən How to pronounce psilocybin (audio)
: a hallucinogenic indole C12H17N2O4P obtained from a fungus (such as Psilocybe mexicana or P. cubensis synonym Stropharia cubensis)

Examples of psilocybin 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.
These self-experimenters take a very small amount of psilocybin mushrooms or LSD to try to reduce anxiety, stress and depression. Staff Report, Hartford Courant, 30 Apr. 2025 The rise of psilocybin use in the United States: A multisource observational study. Josh Hammer, MSNBC Newsweek, 21 Apr. 2025 Colorado's first license for a psilocybin healing center was given to The Center Origin in downtown Denver. Axios Denver, Axios, 1 Apr. 2025 One element was, if anyone takes psilocybin mushrooms, there’s always a feeling of another presence there, or something watching you. Roxana Hadadi, Vulture, 31 Mar. 2025 See All Example Sentences for psilocybin

Word History

Etymology

New Latin Psilocybe, fungus genus + -in entry 1

First Known Use

1958, in the meaning defined above

Time Traveler
The first known use of psilocybin was in 1958

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Cite this Entry

“Psilocybin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psilocybin. Accessed 6 May. 2025.

Kids Definition

psilocybin

noun
psi·​lo·​cy·​bin ˌsī-lə-ˈsī-bən How to pronounce psilocybin (audio)
: a chemical that is obtained from a fungus and causes hallucinations

Medical Definition

psilocybin

noun
psi·​lo·​cy·​bin ˌsī-lə-ˈsī-bən How to pronounce psilocybin (audio)
: a hallucinogenic indole C12H17N2O4P obtained from a basidiomycetous fungus (as Psilocybe mexicana or P. cubensis synonym Stropharia cubensis)

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