α. 1800s– Roentgen's rays (now rare), 1800s– Röntgen's rays (now rare).
β. 1800s– Roentgen rays, 1800s– Röntgen rays.
| 单词 | roentgen rays | 
| 释义 | Roentgen raysn.α. 1800s– Roentgen's rays (now rare), 1800s– Röntgen's rays (now rare). β. 1800s– Roentgen rays, 1800s– Röntgen rays.  Now chiefly historical.   X-rays. Also in singular.The singular use is now largely confined to attributive uses, as in Roentgen ray therapy. ΘΚΠ the world > matter > physics > atomic nucleus > radioactivity > X-rays > 			[noun]		 Roentgen rays1896 X-ray1896 X-ray1896 1896    Lancet 1 Feb. 326/2  				Do Roentgen's rays possess germicidal properties? 1896    Times 13 Feb. 14/1  				He said that on one point respecting the Röntgen rays there was a good deal of misapprehension. 1896    Lancet 22 Feb. 477/1  				Two preliminary short exposures to Roentgen rays indicated that the metal..was probably embedded among the bones of the wrist. 1896    Proc. Amer. Philos. Soc. 35 12  				The demonstration of the Röntgen ray. 1897    T. C. Allbutt et al.  Syst. Med. III. 362  				Skiagraphs taken by means of the X Röntgen rays. 1903    Amer. Practitioner & News 36 39  				The Roentgen rays are useful in locating the foreign bodies in the esophagus. 1920    Arch. Neurol. & Psychiatry 4 605  				New specialties at present undreamt of will continue to arise... Wasserman's reaction, or Roentgen's ray. 1925    Jrnl. Amer. Med. Assoc. 84 14/2  				Making the gall-bladder opaque to the roentgen ray by the injection of certain substances into the blood stream. 1935    C. J. Smith Intermediate Physics 		(ed. 2)	  v. li. 872  				Bismuth compounds absorb Röntgen rays very easily. 1952    E. L. Leeming Road Engin. 		(ed. 3)	 xxiii. 234  				Experiments by the use of microphotography and the Röntgen-ray consist in enlarging by special apparatus..samples of concrete which are observed by means of transmitted or reflected light. 1964    Amer. Jrnl. Surg. 107 556/2  				In 1936 an unknown amount of roentgen ray therapy was given to the right cheek. 2006    S. N. Blair in  W. D. McArdle et al.  Exercise Physiol. xxxii. 968/1  				Relatively dense bone..allows fewer roentgen rays to penetrate its tissue, thus producing a white image. This entry has been updated (OED Third Edition, November 2010; most recently modified version published online March 2022). <  | 
	
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