medium: see spiritism.
Medium may refer to:





Natural Science

In general, a medium is a material that is either itself undergoing a process that is being studied or used (e.g. transmission medium), or enabling another process of interest (e.g. growth medium). Specific examples include the following:

  • Processing medium, in industrial engineering, a material that plays a role in manufacturing processes
  • Excitable medium, a nonlinear dynamic system which has the capacity to propagate a wave
  • gain medium, an 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 exists between the stars within a galaxy

Paranormal and New Age


Dramatic works


  • The Medium, an entertainment weekly at Rutgers University


See also

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