D50

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

• D50 (radiotherapy), the half maximal inhibitory dose, representing the dose of light or ionising radiation that is required for 50% inactivation of a tumor cell population
• the ICD-10 code for Iron deficiency anemia
• a solution of 50% dextrose
• D50 steam locomotive, a pre-war Japanese steam locomotives class related to the D60 steam locomotive class
• CIE Standard Illuminant D50, a lighting standard used in colorimetry, and also in graphic design as a white point
• Nikon D50, an entry-level digital SLR camera
• Roland D-50, a digital synthesizer from the 1980s
• D50 road (Croatia), a state route

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