DX may refer to: In science and medicine:
Diagnosis, medical shorthand symbol generally written as Dx or DxIn technology and the Internet:
DirectX, Microsoft's application programming interface collection, most commonly when referring to a specific version, e.g. DX9.0, DX10
DX encoding, a standard for marking 35 mm and APS film cartridges so that cameras can determine the film's speed and number of exposures
Nikon DX format, an APS-C-sized sensor/lens format for Nikon digital cameras
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An anticancer drug that belongs to the family of drugs called antitumor antibiotics. It is an anthracycline.
An anticancer drug that belongs to the family of drugs called topoisomerase inhibitors. Also called exatecan mesylate.