Other
- The differential of x in calculus
- Dx (digraph)
- 510 in Roman numerals
- Short for USDX, the U.S. Dollar Index
- Delta Chi, a social fraternity
- Deluxe, from the French term "de luxe", which means "of luxury". This term stands for "special quality"
- Destination X (DX), a professional wrestling pay-per-view event produced by Total Nonstop Action Wrestling every March since 2005
- D-Generation X, former professional wrestling stable in WWF/E
Read more about this topic: DX