Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

gamma radiation

noun

Definition of gamma radiation

  1. :  radiation composed of gamma rays

See gamma radiation defined for kids

People Are Reading

image599301899
Pretty in 'Pink'
decimate-video
Is it wrong to use 'decimate' to mean 'destroy'?
alt-5949565fc7d94
'Negging' Moves Beyond The Bar
supreme-court-at-dusk
Trending: SCOTUS: 'Bona Fide' relationships

First Known Use of gamma radiation

1904

Medical Dictionary

gamma radiation

noun

Medical Definition of gamma radiation

  1. :  radiation that is composed of gamma rays and is used in cancer radiotherapy

Learn More about gamma radiation

  1. Britannica.com: Encyclopedia article about gamma radiation

Seen and Heard

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

show hide

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

tristful

play

sad or melancholy

Get Word of the Day daily email!

TRENDING NOW

  1. bona fide Made in good faith

  2. surrogate mother From TMZ to the dictionary.

  3. zealot A fanatical partisan

  4. stonewall to be uncooperative, obstructive, or evasive

  5. scurrilous Containing obscenities, abuse, or slander

SEE ALL

BROWSE DICTIONARY

gamma radiation

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

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!

Words at Play

alt-5949565fc7d94
'Negging' Moves Beyond The Bar

Not just for pick-up artists anymore

alt-5947fc40f1b5c
In Tech, What Does 'K' Mean?

A buzzword with a long history.

alt-5951697e1a410
When To Use 'Specious' vs. 'Spurious'

These similar words are not interchangeable

alt-594bf2ec5f26e
Quick: Read This!

'Quick' once had a very different meaning

Ask the Editors

decimate-video
Is it wrong to use 'decimate' to mean 'destroy'?

Language changes

serial-comma
The Serial Comma

Why don't they call it the Merriam-Webster comma?

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
June 2017 Words of the Day Quiz

Summer's first WOTD quiz.

Take the quiz
alt-5941ad7527c3c
Yearbook Superlatives Quiz

Is that your picture under "Largest Vocabulary"?

Take the quiz
True or False
True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz
Word Winder's CrossWinder
Word Winder's CrossWinder

A game of winding words.

Play the game