Definition of "psilocybin" [psilocybin]

• A hallucinogenic compound, C12H17N2O4P, obtained from the mushroom Psilocybe mexicana. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Test for cyanotic bruising when dried - MOST mushrooms (not all!) which contain psilocybin will generally have a grey-blue bruising on the stalk and cap."
• "New York Times report, preliminary research has shown that hallucinogens - such as psilocybin, which is derived from certain mushrooms - have proven effective at treating a range of psychiatric disorders, including depression, post-traumatic stress disorder and end-of-life anxiety."
• ""'Shrooms" is the common name for mushrooms that contain psilocybin, which is chemically related to LSD."