Definitions of radiation

  1. ( medicine) the treatment of disease ( especially cancer) by exposure to radiation from a radioactive substance
  2. syndrome resulting from exposure to ionizing radiation ( e. g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours; " he was suffering from radiation"
  3. the act of spreading outward from a central source
  4. a radial arrangement of nerve fibers connecting different parts of the brain
  5. the spread of a group of organisms into new habitats
  6. energy that is radiated or transmitted in the form of rays or waves or particles
  7. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
  8. The act of radiating, or the state of being radiated; emission and diffusion of rays of light; beamy brightness.
  9. The shooting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.
  10. Emission or propagation of electromagnetic energy ( waves/ rays), or the waves/ rays themselves; a stream of electromagnetic particles ( electrons, neutrons, protons, alpha particles) or a mixture of these. The most common source is the sun.
  11. The coming forth and spreading, as of rays, in all directions from a common center; as, the radiation of light or heat from a shining or heated body.
  12. 1. The act or condition of diverging in all directions from a center. 2. The sending forth of light or any other rays. 3. A cerebral tract or diverging bundle of white fibers in the brain, see radiatio. 4. A ray.
  13. Act of radiating: the emission and diffusion of rays of light or heat.
  14. The act of radiating, or the state of being radiated.
  15. The diffusion of rays of light; divergence or diffusion from a point, like rays of light.
  16. The emission and diffusion of rays of light or heat from a luminous or heated body; the diverging or shooting forth from a point or surface, like the diverging rays of light.

Usage examples for radiation

  1. Even so, the Uranians on Venus, having an instinctive dread of sunlight because sunlight usually meant radiation, preferred to stay underground. – The Wealth of Echindul by Noel Miller Loomis
  2. Two men were moving around in the lower front room, and the radiation from their green lights showed them plainly. – The White Invaders by Raymond King Cummings
  3. Ken was forced to admit the possibility of this, inasmuch as radiation products were scattered heavily now throughout the Earth's atmosphere. – The Year When Stardust Fell by Raymond F. Jones
  4. Now a clank of metal against metal sounded behind me; from the side passage a figure in radiation armor moved out. – Greylorn by John Keith Laumer
  5. Now blast off, Lieutenant, and rake that radiation. – Rip Foster in Ride the Gray Planet by Harold Leland Goodwin
  6. 3. They multiply, by the expansion of their branches, the surfaces which are cooled by radiation. – The Earth as Modified by Human Action by George P. Marsh
  7. It was assumed that whatever or whoever had landed in Boulder Lake possessed a beam- it might as well be called a terror beam because of the effects it had- of some sort of radiation which produced the paralysis and the agony. – Operation Terror by William Fitzgerald Jenkins
  8. Here, he said, tearing at it, radiation. – The Colors of Space by Marion Zimmer Bradley
  9. Yet with this immense radiation it suffers no diminution of energy; nor can any scientist yet discern from what source this power is fed. – The Life Radiant by Lilian Whiting
  10. Heat also passes from a body in straight lines or rays, which do not heat the air through which they pass to their own temperature, but do impart that temperature to a solid body, as iron or water; the heat that passes from a body in this manner is termed radiant heat, or the heat of radiation. – Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
  11. The intensity of the sun's heat must then be not less than nine times as great as the greatest radiation to which we are exposed. – The Story of the Heavens by Robert Stawell Ball
  12. The mode of accomplishing this is by placing coils of steam, or hot water pipes, under windows, which warm the parlor walls and furniture, partly by radiation, and partly by the air warmed on the heated surfaces of the coils. – The American Woman's Home by Catherine E. Beecher and Harriet Beecher Stowe
  13. Owing to these facts, the injected air of a furnace is always warmer than is good for the lungs, and much warmer than is ever needed in rooms warmed by radiation from fires or heated surfaces. – The American Woman's Home by Catherine E. Beecher and Harriet Beecher Stowe
  14. But the deadness of Helen's feelings, the heartlessness because of which she cried out against herself, seemed, in a vague way, by herself unacknowledged yet felt, if not caused by, yet associated with some subtle radiation from the being of George Bascombe. – Thomas Wingfold, Curate by George MacDonald
  15. Martin, the boy with the radiation- shattered nervous system. – Anything You Can Do by Gordon Randall Garrett
  16. If we place a lens of the same size as the searchlight aperture in the path of the beam and concentrate all the light, and heat, at one spot, the focal point of the lens, the temperature at that point is the same as the temperature of the source of the light, less what has been lost by radiation. – Astounding Stories of Super-Science, March 1930 by Various
  17. It is not to be said or written without a convincing sense of sunshine, and from the very word come light and radiation. – Essays by Alice Meynell
  18. He read Arab writers and studied the radiation of light and heat. – Our Legal Heritage, 4th Ed. by S. A. Reilly
  19. Equally true is it that regret implies real possibilities in the world- not always, though, for we may regret death or the radiation into extra terrestrial space of solar energy without believing that the prevention of either is possible. – Determinism or Free-Will? by Chapman Cohen