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Medium may refer to:


  • Medium of instruction, any language or other tools used to educate, train, or instruct
  • Media (communication), storage and/or transmission tools used to store and deliver information or data
  • Transmission medium, in physics and telecommunications, any material substance which can propagate waves or energy
    • Optical medium, material through which electromagnetic waves propagate


Natural science[edit]

  • Excitable medium, a non-linear dynamic system which has the capacity to propagate a wave
  • Active laser medium (also called gain medium or lasing medium), a quantum system that allows amplification of power (gain) of waves passing through (usually by stimulated emission)
  • Growth medium (or culture medium), in biotechnology, an object in which microorganisms or cells experience growth
  • Interplanetary medium, in astronomy, material which fills the solar system
  • Interstellar medium, in astronomy, the matter and energy content that exist
  • Porous medium, in engineering and earth sciences, a material that allows fluid to pass through it, such as sand
  • Processing medium, in industrial engineering, a material that plays a role in manufacturing processes
  • data storage medium, a storage container in computing




TV and Film[edit]


Other uses

  • Mediumship, the practice of certain people—known as mediums—to purportedly mediate communication between spirits of the dead and living human beings
  • Tecma Medium, a French hang glider design
  • Medium bomber, a class of war plane

See also[edit]