xra·di·a·tion [,eks-,rā-dē-'ā-shən] -n

  1. exposure to X-rays
  2. radiation composed of X-rays

Xrat·ed ['eks-'rā-təd] -adj

  1. having a rating of X
  2. relating to or characterized by explicit sexual material or activity
    • an Xrated book
  3. obscene, vulgar
    • an Xrated gesture

Xray ['eks-,rā]

  1. a communications code word for the letter x

xray ['eks-,rā] -vt

  1. to examine, treat, or photograph with X-rays

Xray ['eks-,rā] -n, adj

  1. any of the electromagnetic radiations that have an extremely short wavelength of less than 100 angstroms and have the properties of penetrating various thicknesses of all solids, of producing secondary radiations by impinging on material bodies, and of acting on photographic films and plates as light does
  2. a photograph obtained by use of X-rays

Xray astronomy -n

  1. astronomy dealing with investigations of celestial bodies by means of the X-rays they emit

Xray diffraction -n

  1. a scattering of X-rays by the atoms of a crystal that produces an interference effect so that the diffraction pattern gives information on the structure of the crystal or the identity of a crystalline substance

Xray star -n

  1. a luminous celestial object emitting a major portion of its radiation in the form of X-rays called also X-ray source

Xray therapy -n

  1. medical treatment (as of cancer) by controlled application of X-rays

Xray tube -n

  1. a vacuum tube in which a concentrated stream of electrons strikes a metal target and produces X-rays