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.
- ra·di·a·tion·al, adjective
- an·ti·ra·di·a·tion, adjective
- in·ter·ra·di·a·tion, noun
- non·ra·di·a·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use radiation in a sentence
They shoot bright spurts of radiation into space, said David Berghmans.
Deinococcus, which can be found high up in our atmosphere, is known for its unusual ability to resist genetic damage from high doses of ultraviolet radiation and its tendency to form relatively large colonies.Clumps of bacteria could spread life between planets | Paola Rosa-Aquino | August 27, 2020 | Popular-Science
DNA analysis suggested the radiation had fried their genetic material.If bacteria band together, they can survive for years in space | Jonathan Lambert | August 26, 2020 | Science News
For decades, that meant sterilizing males by exposing them to radiation and then releasing them into the wild.Genetically modified mosquitoes have been OK’d for a first U.S. test flight | Susan Milius | August 22, 2020 | Science News
We’re also bathed in locally-sourced, artisanal electromagnetic radiation.The Universe Has Made Almost All the Stars It Will Ever Make - Issue 89: The Dark Side | Caleb Scharf | August 19, 2020 | Nautilus
He was very familiar with the reality of what could happen: Tokyo could be covered with a really high dosage of radiation.
Everything serene, snow piling on trees, over lawns, on houses, before we realize that all the snow is poisoned with radiation.
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 | THE DAILY BEAST
She said that whenever she came into the room, she had felt the radiation of a vast and unseen force.
Hawking radiation for realistic black holes is a minuscule effect, and the bigger the black hole, the less radiation there is.
The effect of the heated air which acquires its temperature by radiation from the earth's surface is to produce the winds.Outlines of the Earth's History | Nathaniel Southgate Shaler
If we can imagine the earth cut off from the solar radiation, the air would cease to move.Outlines of the Earth's History | Nathaniel Southgate Shaler
Aboard were not only oceanographers, but marine biologists experienced in radiation physics.The Flaming Mountain | Harold Leland Goodwin
Short hard radiation emitted from the tab neutralized the claws, put them out of commission.Second Variety | Philip Kindred Dick
radiation tabs protected the UN troops, but if a man lost his tab he was fair game for the claws, no matter what his uniform.Second Variety | Philip Kindred Dick
British Dictionary definitions for radiation
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
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
- radiational, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for radiation
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for radiation
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.