psilocybin
noun
psi·lo·cy·bin
ˌsī-lə-ˈsī-bən 
: 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
Earlier studies pointed toward the possibility of psilocybin as a potential antidepressant, prompting researchers to conduct the first-ever randomized clinical trial.
—
Khloe Quill, FOXNews.com, 24 June 2025
The present trial assessed the long-term effectiveness of a single dose of psilocybin combined with psychological support in adult patients with cancer and depression.
—New Atlas, 21 June 2025
With the recent rollout of Colorado’s psilocybin therapy industry, the state has cemented its place at the forefront of the psychedelic movement.
—Tiney Ricciardi, Denver Post, 20 June 2025
Eating mushrooms that contain psilocybin can have various effects, ranging from euphoria to hallucinations, according to the agency.
—Ingrid Vasquez, People.com, 29 May 2025
See All Example Sentences for psilocybin
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.
Khloe Quill, FOXNews.com, 24 June 2025
The present trial assessed the long-term effectiveness of a single dose of psilocybin combined with psychological support in adult patients with cancer and depression.
—New Atlas, 21 June 2025
With the recent rollout of Colorado’s psilocybin therapy industry, the state has cemented its place at the forefront of the psychedelic movement.
—Tiney Ricciardi, Denver Post, 20 June 2025
Eating mushrooms that contain psilocybin can have various effects, ranging from euphoria to hallucinations, according to the agency.
—Ingrid Vasquez, People.com, 29 May 2025
See All Example Sentences for psilocybin
Cite this Entry
“Psilocybin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/psilocybin. Accessed 20 Jul. 2025.
Copy CitationKids Definition
psilocybin
noun
psi·lo·cy·bin
ˌsī-lə-ˈsī-bən
: a chemical that is obtained from a fungus and causes hallucinations
Medical Definition
psilocybin
noun
psi·lo·cy·bin
ˌsī-lə-ˈsī-bən
: a hallucinogenic indole C12H17N2O4P obtained from a basidiomycetous fungus (as Psilocybe mexicana or P. cubensis synonym Stropharia cubensis)
Love words? Need even more definitions?
Merriam-Webster unabridged
Share