Word.ws English Dictionary

psilocybin

UK/ˌsʌɪ.lə(ʊ)ˈsʌɪ.bɪn//ˌsɪ.ləˈsaɪ.bɪn/

psilocybin noun: a hallucinogenic alkaloid, C₁₂H₁₅N₂O·H₂PO₃, present in several species of Central American mushroom and producing effects similar to LSD. The prodrug of psilocin.

Noun

psilocybin (countable and uncountable, plural psilocybins)

  1. A hallucinogenic alkaloid, C₁₂H₁₅N₂O·H₂PO₃, present in several species of Central American mushroom and producing effects similar to LSD. The prodrug of psilocin.
    • The problem of the mushroom supply was solved straight away when Leary learned from a graduate student named George Litwin that a chemist at the Sandoz Corporation, Dr. Albert Hofmann, had recently synthesized the psychoactive molecule of the mushroom, calling it psilocybin.2004, Martin Torgoff, “Psychedelic Spring”, in Can’t Find My Way Home: America in the Great Stoned Age, 1945–2000, New York, N.Y.: Simon & Schuster, →ISBN, page 70
    • It’s no stretch to posit that because human neurotransmitters respond to the platform’s iconic use of a certain shade of blue, and spark with dopamine upon receiving a “like” or “tag” notification, desperate children are now living in cages and a raving madman occupies the Oval Office. Not even...2019 January 29, Tom Bissell, “An Anti-Facebook Manifesto”, in New York Times

Forms of psilocybin

pluralpsilocybins

Origin of psilocybin

Borrowed from German Psilocybin (coined by Albert Hofmann), from translingual Psilocybe (“genus of mushroom”) + -in.

Words formed from psilocybin

Phrases with psilocybin

Questions about psilocybin

What does psilocybin mean?
Psilocybin means a hallucinogenic alkaloid, C₁₂H₁₅N₂O·H₂PO₃, present in several species of Central American mushroom and producing effects similar to LSD. The prodrug of psilocin.
What part of speech is psilocybin?
Psilocybin is a noun.
How do you pronounce psilocybin?
Psilocybin is pronounced /ˌsɪ.ləˈsaɪ.bɪn/ (US).
What is the plural of psilocybin?
The plural of psilocybin is psilocybins.

Words near psilocybin in the dictionary

  1. psiloceratid
  2. psiloceratids
  3. psilocin
  4. psilocybe
  5. psilocybes
  6. psilocybin
  7. psilocybin mushroom
  8. psilocybin mushrooms
  9. psilocybins
  10. psilocyn
  11. psiloi

Source and license

Adapted from Wiktionary: psilocybin (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: Psilocybin.wav.

Cite this entry: “psilocybin.” Word.ws, https://word.ws/psilocybin. Based on Wiktionary, CC BY-SA 4.0.