- the process in which energy is emitted as particles or waves.
- the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body.
- the energy transferred by these processes.
- the act or process of radiating.
- something that is radiated.
- radial arrangement of parts.
Origin of radiation
Examples from the Web for radiation
He was very familiar with the reality of what could happen: Tokyo could be covered with a really high dosage of radiation.Takashi Murakami’s Art From Disaster
November 28, 2014
Everything serene, snow piling on trees, over lawns, on houses, before we realize that all the snow is poisoned with radiation.The Internet Embedded in Your Head
November 21, 2014
The 4M craft also includes a radiation dosimeter built by the Spanish company iC-Málaga.Luxembourg and China Team Up on Private Mission to the Moon
Matthew R. Francis
October 26, 2014
She said that whenever she came into the room, she had felt the radiation of a vast and unseen force.Those Kansas City Blues: A Family History
October 24, 2014
Those Chinese reports also talked about radiation deaths in Chicago.Putin Threatens Nuclear War Over Ukraine
Gordon G. Chang
August 31, 2014
Perhaps the tape was fuzzy or it may have been fogged in transit by radiation.Mezzerow Loves Company
Floyd L. Wallace
There is also a significant amount of radiation characteristic of uranexite.
"Here's the source of radiation, sir," a searchman reported.
The apparent attributes of the stars are studied by the aid of their radiation.
The radiation of a star is different for different wave-lengths (λ).
- the emission or transfer of radiant energy as particles, electromagnetic waves, sound, etc
- the particles, etc, emitted, esp the particles and gamma rays emitted in nuclear decay
- Also called: radiation therapy med treatment using a radioactive substance
- anatomy a group of nerve fibres that diverge from their common source
- See adaptive radiation
- the act, state, or process of radiating or being radiated
- surveying the fixing of points around a central plane table by using an alidade and measuring tape
Word Origin and History for radiation
mid-15c., "act or process of radiating," from Middle French radiation and directly from Latin radiationem (nominative radiatio) "a shining, radiation," noun of action from past participle stem of radiare "to beam, shine, gleam; make beaming," from radius "beam of light; spoke of a wheel" (see radius). Meaning "rays or beams emitted" is from 1560s. Meaning "divergence from a center" is 1650s.
- The act or condition of diverging in all directions from a center.
- The emission and propagation of energy in the form of rays or waves.
- The energy radiated or transmitted in the form of rays, waves, or particles.
- A stream of particles or electromagnetic waves that is emitted by the atoms and molecules of a radioactive substance as a result of nuclear decay.
- The radial arrangement of anatomical or histological parts.
- The spread of a group of organisms into new habitats.
- Streams of photons, electrons, small nuclei, or other particles. Radiation is given off by a wide variety of processes, such as thermal activity, nuclear reactions (as in fission), and by radioactive decay.
- The emission or movement of such particles through space or a medium, such as air. See Notes at conduction electromagnetic radiation.
- The use of such energy, especially x-rays, in medical diagnosis and treatment.