| 单词 | xrays |
| 释义 | Xray or xray /eksˈrā/noun(in international radio communication) a code word for the letter x X-ray /eksˈrā/nounAn electromagnetic ray of very short wavelength which can penetrate matter opaque to light-rays, produced when high-energy electrons impinge on matter, discovered by Röntgen in 1895 (also adjective) nounA photograph taken by X-rays transitive verbTo photograph or treat by, or otherwise expose to, X-rays ORIGIN: X (symbol) after its unknown nature on discovery; translated from original Ger term X-Strahlen (pl), Strahl a ray X-ray astronomy noun A branch of astronomy using satellites or rockets to detect and measure X-ray emissions from stars, etc X-ray crystallography noun The study of crystal structures as shown by their diffraction of X-rays X-ray diffraction noun The characteristic interference pattern produced by X-rays passing through a crystal structure X-ray micrography noun The preparation, and study through the microscope, of radiographs obtained by means of X-rays X-ray spectrum noun A wavelength or frequency diagram in which a series of lines indicate by their positions the energy of the X-rays emitted by a body as the result of electron bombardment X-ray telescope noun A telescope designed to investigate the emission of X-rays from stars, etc X-ray therapy noun The use of X-rays for medical treatment X-ray tube noun A tube enclosing a vacuum, in which X-rays are emitted from a metal target placed obliquely opposite to an incandescent cathode whose high-energy electrons impinge on the target characteristic X-rays Secondary X-rays emitted when X-rays fall on matter, which contain monochromatic radiations that vary in wavelength according to the atoms from which they are scattered |
| 随便看 |
英语词典包含305067条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。