D50

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D50, D-50 or D 50 may refer to:

  • D50 (medicine), the half maximal inhibitory dose, representing the dose of light or ionising radiation that is required for 50% inactivation of a tumor cell population.
  • D50 (white point), in graphic design, one of the standard illuminants defined by the International Commission on Illumination
  • Nikon D50, an entry-level digital SLR camera
  • Roland D-50, a digital synthesizer from the 1980s
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