roentgen ray


  • WordNet 3.6
    • n roentgen ray electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
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Webster's Revised Unabridged Dictionary
    • Roentgen ray (Physics) An X-ray; originally, the term was applied to any of the rays produced when cathode rays strike upon surface of a solid (as the wall of the vacuum tube), but now it refers specifically to electromagnetic radiation having wavelengths from 10-3 nm to 10 nm, immediately below ultraviolet radiation on the wavelength scale. Röntgen rays are noted for their penetration of opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Röntgen. They are one of the forms of ionizing radiation, which can have damaging effects on living cells. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are used in examining opaque objects, especially in medicine for visualizing organs and other objects inside the human body, as for locating fractures or bullets, and examining internal organs for abnormalities.
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Webster's Revised Unabridged Dictionary
see Röntgen


In literature:

X-ray, n. the Roentgen ray.
"Putnam's Word Book" by Louis A. Flemming
The limb was set under chloroform with the help of Roentgen rays, and the dog made a good recovery.
"Studies in the Psychology of Sex, Volume 5 (of 6)" by Havelock Ellis
But the women who can see clear through a man, like a Roentgen ray, do not invite soft demonstration.
"Little Journeys to the Homes of the Great, Vol. 2 of 14" by Elbert Hubbard
Thus arose the so-called X or Roentgen rays.
"Recent Developments in European Thought" by Various
Beyond eight hundred vibrations there is plenty of light, invisible to our eyes, known as chemical rays and probably the Roentgen rays.
"Among the Forces" by Henry White Warren
Go ask Roentgen why he did not keep the X-rays a secret to be exploited for his own personal gain.
"Craftsmanship in Teaching" by William Chandler Bagley
Think of the Roentgen rays!
"The Young Man and the World" by Albert J. Beveridge
Roentgen rays and radium have also figured in recent years in the treatment of disease.
"Artificial Light" by M. Luckiesh
Roentgen ray, ii, 169; viii, 359.
"Little Journeys to the Homes of the Great - Volume 14" by Elbert Hubbard
Meanwhile the next great step was when, in 1895, Roentgen discovered the X-rays, which are now known to everybody.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
You do not stand out against wireless telegraphy or the Roentgen ray?
"The Shadow World" by Hamlin Garland
Others speak of it as the Roentgen rays.
"Little Masterpieces of Science:" by Various
The phonograph and the Roentgen rays are only waiting their turn to serve in the cause of justice.
"Legal Lore" by Various
The Spectrum Analysis that tells us of the substance of the sun; the Roentgen rays that change the opaque to the transparent.
"The Works of Robert G. Ingersoll, Vol. 4 (of 12) Dresden Edition--Lectures" by Robert G. Ingersoll
What miracles are wireless telegraphy, flying-machines, the Roentgen ray!
"Unicorns" by James Huneker
Later, perhaps, the Roentgen rays may be beneficially applied to this disease in dogs, as in human beings.
"A Manual of Toy Dogs" by Mrs. Leslie Williams
We have seen the discovery of the Roentgen Rays born of observation.
"The Montessori Method" by Maria Montessori
This radiation is called Roentgen rays, or more commonly, "X" rays.
"Physics" by Willis Eugene Tower
Call it the X-poison, if you will, as Roentgen did with his unknown ray.
"The Treatment of Hay Fever" by George Frederick Laidlaw
The Roentgen ray has added to the surgeon's armoury a powerful weapon.
"The Romance of Modern Invention" by Archibald Williams

In news:

8, 1895: Roentgen Stumbles Upon X-Rays.