irradiation

play
noun ir·ra·di·a·tion \ i-ˌrā-dē-ˈā-shən \

Definition of irradiation

1 :exposure to radiation (such as X-rays or alpha particles)
2 :the application of radiation (such as X-rays or gamma rays) for therapeutic purposes or for sterilization (as of food); also :partial or complete sterilization by irradiation

Recent Examples of irradiation from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'irradiation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of irradiation

1901


IRRADIATION Defined for Kids

irradiation

play
noun ir·ra·di·a·tion \ i-ˌrā-dē-ˈā-shən \

Definition of irradiation for Students

:exposure to radiation

Medical Dictionary

irradiation

play
noun ir·ra·di·a·tion \ ir-ˌād-ē-ˈā-shən \

medical Definition of irradiation

1 a :the radiation of a physiologically active agent from a point of origin within the body; especially :the spread of a nerve impulse beyond the usual conduction path
b :apparent enlargement of a light or bright object or surface when displayed against a dark background
2 a :exposure to radiation (as X-rays or alpha particles)
b :application of radiation (as X-rays or gamma rays) for therapeutic purposes or for sterilization (as of food)


Seen and Heard

What made you want to look up irradiation? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to curse or denounce

Get Word of the Day daily email!

Test Your Vocabulary

Merriam-Webster's New Words Quiz—Fall 2017 Edition!

  • young-plant-shoots
  • Which of the following is a new sense of the word bunny?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!