A doctor views an X-ray of a patient's chest.
- The definition of an X-ray is a picture taken of the inside of something using high energy electromagnetic radiation with short wavelengths that can pass through items.
A picture that the doctor takes of your insides to see if you have any broken bones is an example of an X-ray.
- To X-ray is also the act of examining, treating or photographing something using electromagnetic radiation.
An example of to X-ray is when the dentist uses an X-ray machine to find a cavity in a tooth.
- a band of electromagnetic radiation with wavelengths between gamma rays and ultraviolet radiation (c. .005 to c. 5 nanometers)
- a stream of electromagnetic waves within this band: X-rays are capable of penetrating opaque or solid substances, ionizing gases, and, by extended exposure, destroying organic tissue: they are widely used in medicine for diagnosis and treatment of certain organic disorders
- a photograph made by means of X-rays
Origin of X-raytranslated, translation of German x-strahl (; from x, algebraic symbol for an unknown quantity + strahl, ray): so named by W. C. Roentgen (1895), because of its unknown character
nounalso x ray or X ray
- a. A photon of electromagnetic radiation of very short wavelength, ranging from about 10 down to 0.01 nanometers, and very high energy, ranging from about 100 up to 100,000 electron volts.b. often x-rays A narrow beam of such photons. X-rays are used for their penetrating power in radiography, radiology, radiotherapy, and scientific research. Also called roentgen ray.
- a. A photograph taken with x-rays.b. The act or process of taking such a photograph: Did the patient move during the x-ray?
transitive verbx-rayed, x-ray·ing, x-rays also X-rayed or X-ray·ing or X-rays
- To irradiate with x-rays.
- To photograph with x-rays.
Origin of x-rayFrom translation of obsolete German X-Strahlen, x-rays (coined by their discoverer Wilhelm Conrad Roentgen ) : xx, unknown factor (since x-rays were a previously unknown form of radiation) + Strahlen, pl. of Strahle, ray.
of an adult human hand
- Alternative spelling of X-ray.