Geiger counter

noun
Gei·​ger counter | \ ˈgī-gər- How to pronounce Geiger counter (audio) \

Definition of Geiger counter

: an instrument for detecting the presence and intensity of radiations (such as cosmic rays or particles from a radioactive substance) by means of their ionizing effect on an enclosed gas which results in a pulse that is amplified and fed to a device giving a visible or audible indication

First Known Use of Geiger counter

1924, in the meaning defined above

History and Etymology for Geiger counter

Hans Geiger †1945 German physicist

Keep scrolling for more

Learn More about Geiger counter

Time Traveler for Geiger counter

Time Traveler

The first known use of Geiger counter was in 1924

See more words from the same year

Statistics for Geiger counter

Cite this Entry

“Geiger counter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Geiger%20counter. Accessed 26 May. 2020.

Keep scrolling for more

More Definitions for Geiger counter

Geiger counter

noun
How to pronounce Geiger counter (audio)

English Language Learners Definition of Geiger counter

: an instrument used for finding and measuring radioactivity

Geiger counter

noun
Gei·​ger counter | \ ˈgī-gər- How to pronounce Geiger counter (audio) \

Kids Definition of Geiger counter

: an instrument for detecting the presence of cosmic rays or radioactive substances

Geiger counter

noun
Gei·​ger count·​er | \ ˈgī-gər-ˌkau̇n-tər How to pronounce Geiger counter (audio) \

Medical Definition of Geiger counter

: an instrument for detecting the presence and intensity of radiations (as cosmic rays or particles from a radioactive substance) by means of the ionizing effect on an enclosed gas which results in a pulse that is amplified and fed to a device giving a visible or audible indication

More from Merriam-Webster on Geiger counter

Spanish Central: Translation of Geiger counter

Nglish: Translation of Geiger counter for Spanish Speakers

Comments on Geiger counter

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

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Obscure Shapes

  • a pile of three dimensional shapes in green
  • Something that is ooid is shaped like:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

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!