- X-ray optical components
- X-ray optical systems
- X-ray optics
- X-ray orientator
- X-ray oscillation photograph
- X-ray peak broadening
- Xray peak broadening
- X-ray phase analysis
- Xray phase analysis
- x-ray phase analysis
- X-ray phase contrast imaging technique
- X-ray photoelectron
- X-ray photoelectron emission microscopy
- Xray photoelectron emission microscopy
- X-ray photoelectron spectroscopy
- Xray photoelectron spectroscopy
- X-ray photoelectron spectroscopy (XPS)
- X-ray photoelectron spectroscopy, XPS
- Xray photoelectron spectroscopy (XPS)
- X-ray photogrammetry
- X-ray photograph image intensifier
- X-ray photon
- X-ray photon-excited secondary electron emission microscopy
- X-ray photon-excited secondary electron emission microscopy, XPSEEM
- X-ray polarization