noun Also x ray, X ray.
- Often x-rays. a form of electromagnetic radiation, similar to light but of shorter wavelength and capable of penetrating solids and of ionizing gases.
- such radiation having wavelengths in the range of approximately 0.1–10 nm.
verb (used with object)
Origin of x-ray
Examples from the Web for x-ray
An x-ray two hours later confirms my hunch: my tibia (the big bone behind the shin) is snapped clean in two.
(It has subsequently become standard procedure to X-ray a body as part of an autopsy).
The three astronomers argued persuasively that the rhythm of X-ray bursts they measured is most likely due to the M82 X-1.
Thus, the SHU was chock full of contraband, because all the x-ray machines were used by the clinics and not the guards.
However, researchers measured a decrease in X-ray emission last year: something new was blocking the light from reaching us.
They seemed to pierce her with an X-ray quality of comprehension.The Bartlett Mystery|Louis Tracy
You have all you can do attending to the grub question, said X-Ray, sternly.Phil Bradley's Snow-shoe Trail|Silas K. Boone
When the X-ray picture revealed his secret he sobbed out, "He didn't mean to do it."News Writing|M. Lyle Spencer
The X-ray moves in straight lines, I understand, while light has a wave motion.The Tyranny of the Dark|Hamlin Garland
"The Koerting; so it is," said the Baron, when shown the X-ray photograph of his calf.
British Dictionary definitions for x-ray
- electromagnetic radiation emitted when matter is bombarded with fast electrons. X-rays have wavelengths shorter than that of ultraviolet radiation, that is less than about 1 × 10 –8 metres. They extend to indefinitely short wavelengths, but below about 1 × 10 –11 metres they are often called gamma radiation
- (as modifier)X-ray astronomy
Word Origin for X-ray
Word Origin and History for x-ray
1896, translation of German X-strahl, from X, algebraic symbol for an unknown quantity, + Strahl (plural Strahlen) "beam, ray." Coined 1895 by German scientist Wilhelm Conrad Röntgen (1845-1923), who discovered them.
Medicine definitions for x-ray
Science definitions for x-ray
Culture definitions for x-ray (1 of 2)
Culture definitions for x-ray (2 of 2)
A photograph or image obtained through the use of x-rays. An x-ray is taken when an image of internal body structures (such as bones or organs) is needed to diagnose disease or determine the extent of injuries.