X ray A penetrating electromagnetic radiation, usually generated by accelerating electrons to high velocity and suddenly stopping them by collision with a solid body, or by inner-shell transitions of atoms with atomic number greater than 10; their wavelength ranges from about 10(-5) angstrom to 10 angstroms, the average wavelength used in research being 1 angstrom ['eksrei]

environ.

rayons X

X-rayed

transp.

testé aux rayons X

English thesaurus

X-ray ['eksreɪ]

abbr., chem., scient.

Röntgen beam technology

abbr., scottish

X (phonetic alphabet)

chem.

Rontgen beam technology

mil., abbr.

tech.

Roentgen-ray; energetic high-frequency electromagnetic radiation

X-Ray

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