单词 | characteristic X-rays |
释义 | 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 character /karˈək-tər (Spenser, Shakespeare, etc -akˈ)/noun
ORIGIN: Fr caractère, from L charactēr, from Gr charaktēr, from charassein to cut, engrave charˈacterful adjective charˈacterism noun
characterisˈtic noun
characterisˈtic or characterisˈtical adjective characterisˈtically adverb characterīzāˈtion or characterīsāˈtion noun charˈacterize or charˈacterise transitive verb
charˈacterless adjective Without character or distinctive qualities charˈacterlessness noun characterolˈogist noun characterolˈogy noun The science or study of the variety and development of character charˈactery (also (Shakespeare) /-akˈ/) noun (archaic)
character actor noun An actor who plays character parts character assassination noun The destruction of a person's reputation by slander, rumour, etc character code noun (computing) The particular binary code used to represent a character characteristic curve noun (image technol) A graph used to plot the relationship of the density of a photographic material and the logarithm of the exposure producing this density characteristic function noun (mathematics) Of a set, a function that assigns the value 1 to all points in the set, but zero to those outside characteristic radiation noun (physics) The wavelength of radiation that characterizes the atom of a particular substance characteristic spectrum noun (physics) The ordered arrangement of the frequencies of radiation characteristic of the material giving rise to it characteristic X-rays see under X character part noun A stage or film role portraying an unusual or eccentric personality type character recognition noun (computing) A process used to recognize individual printed or written characters character sketch noun A short description of the main traits in a person's character character witness noun A person who makes a statement or gives evidence providing details of eg an accused person's character and past behaviour to a court of law in character
out of character Not in character, unlike that which one would expect from the person concerned |
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