Monad

• Monad (philosophy), a term meaning "unit"
  • Monism, the concept of "one essence" in the metaphysical and theological theory
  • Monad (Gnosticism), the most primal aspect of God in Gnosticism
• Great Monad, an older name for the taijitu symbol

• Monad (biology), a historical term for a simple unicellular organism
• Monad (category theory), a construction in category theory
• Monad (functional programming), constructs that capture various notions of computation
• Monad (homological algebra), a 3-term complex
• Monad (nonstandard analysis), the set of points infinitesimally close to a given point

Books

• Monadologia Physica, by Immanuel Kant
• La Monadologie, by Gottfried Leibniz, a book about a basic unit of perceptual reality
• Monas Hieroglyphica, a 1564 book by John Dee describing a symbol of his own invention

Fictional entities

• Monads, megastructures in Robert Silverberg's 1971 novel The World Inside
• Monad Proxy, a character in the 2006 anime series Ergo Proxy
• John Monad, the title character of the 2007 television series John from Cincinnati
• Monad/Monado, a sword in the 2010 videogame Xenoblade Chronicles

Other uses in media and arts

• Monad (music), a single note or pitch

• Monad University, in Hapur, Uttar Pradesh, India
• Monad shell, the code name for the PowerShell command line interface for Microsoft Windows