[sil-uh-sin, sahy-luh-]
noun Biochemistry.
a psilocybin metabolite with strong hallucinogenic potency, produced after ingestion of the mushroom Psilocybe mexicana.

1955–60; psiloc(ybin) + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

psilocin psil·o·cin (sĭl'ə-sĭn, sī'lə-)
A potent hallucinogenic compound related to psilocybin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


hallucinogenic principles contained in certain mushrooms (notably two Mexican species, Psilocybe mexicana and Stropharia cubensis). Hallucinogenic mushrooms used in religious ceremonies by the Indians of Mexico were considered sacred and were called "god's flesh" by the Aztecs. In the 1950s the active principles psilocin and psilocybin were isolated from the Mexican mushrooms. They are not used in modern medicine

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Certain types of mushrooms contain hallucinogenic chemicals, psilocybin and psilocin.
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