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Showing results for irradiation. Search instead for Diradiation.
Synonyms

irradiation

American  
[ih-rey-dee-ey-shuhn] / ɪˌreɪ diˈeɪ ʃən /

noun

  1. the act of irradiating.

  2. the state of being irradiated.

  3. intellectual or spiritual enlightenment.

  4. a ray of light; beam.

  5. Optics. the apparent enlargement of an object when seen against a dark background.

  6. the use of x-rays or other forms of radiation for the treatment of disease, the making of x-ray photographs, the manufacture of vitamin D, etc.

  7. exposure or the process of exposure to x-rays or other radiation.

  8. Physics. irradiance.

irradiation British  
/ ɪˌreɪdɪˈeɪʃən /

noun

  1. the act or process of irradiating or the state of being irradiated

  2. the apparent enlargement of a brightly lit object when it is viewed against a dark background

  3. a shaft of light; beam or ray

  4. med

    1. the therapeutic or diagnostic use of radiation, esp X-rays

    2. exposure of a patient to such radiation

  5. another name for radiation irradiance

"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

Other Word Forms

  • postirradiation adjective

Etymology

Origin of irradiation

First recorded in 1580–90, irradiation is from the Late Latin word irradiātiōn- (stem of irradiātiō ). See ir- 1, radiation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In addition to demonstrating how electron irradiation drives polymerization and restructuring, the experiment revealed TEM's potential for studying controlled reactions in other organic molecules as well.

From Science Daily • Oct. 29, 2025

This study is the first to show that such plasma irradiation can accelerate tendon repair.

From Science Daily • May 21, 2024

Zeolites can become amorphous when subjected to electron beam irradiation, but that damage is related to the composition of the zeolite, and the team found that some pollucite inclusions were stable in the electron beam.

From Science Daily • May 15, 2024

"Contrary to external UV irradiation technique, UV-emitting glass inhibits biofilm formation directly at the surface of interest -- the surface itself serves as a UVC source," says Alidokht.

From Science Daily • Apr. 2, 2024

The following year, doctors working with John Lawrence conceived a new use for the cyclotron: the direct irradiation of patients.

From "Big Science" by Michael Hiltzik

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.