1. Electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
   - X ray, X-ray, roentgen ray 
2. Obtaining images by the use of X rays
   - X-raying

Type of: electromagnetic radiation, electromagnetic wave, imaging, ionizing radiation, nonparticulate radiation, tomography

• peripatetic
• peripateticism
• Peripatidae
• Peripatopsidae
• Peripatopsis
• peripatus
• peripeteia
• peripetia
• peripety
• peripheral
• peripheral device
• peripheral nervous system
• peripheral vision
• peripherally
• periphery
• periphrasis
• periphrastic
• periphrastically
• Periplaneta
• Periplaneta americana
• Periplaneta australasiae
• periplasm
• periplasmic space
• Periploca
• Periploca graeca