Psilocybin is a naturally occurring psychoactive compound found in many species of mushrooms. It is known for its mind-altering effects and has been used for centuries in traditional spiritual practices. There are several synonyms for psilocybin that are commonly used, including magic mushrooms, shrooms, psychedelic mushrooms, sacred mushrooms, and teonanácatl (Aztec for "divine mushroom"). Psilocybin has gained popularity in recent years for its potential therapeutic benefits, including treating depression, anxiety, and addiction. However, it is still legally classified as a Schedule I substance in the United States, which means that it is illegal to possess or use without a medical prescription.