beta particle


Definition of beta particle

: a high-speed electron specifically : one emitted by a radioactive nucleus in beta decay

Examples of beta particle in a Sentence

Recent Examples on the Web

Of course the frisker was measuring gamma waves in addition to alpha and beta particles; all these people presumably cared about was the particles, which could continue to do harm after being removed from the zone. Aaron Gilbreath, Longreads, "As Innocuous as Plant No. 1," 10 Apr. 2018 Radionuclides: Water systems monitor for beta particles and photon radioactivity in drinking water. Nathaniel Levine, sacbee, "1,741 districts violated drinking water rules in 2016. Did you drink their water?," 22 Sep. 2017

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

First Known Use of beta particle

1904, in the meaning defined above

Keep scrolling for more

Learn More about beta particle

Statistics for beta particle

Look-up Popularity

Time Traveler for beta particle

The first known use of beta particle was in 1904

See more words from the same year

Keep scrolling for more

More Definitions for beta particle

beta particle


Medical Definition of beta particle

: a high-speed electron specifically : one emitted during radioactive decay of an atomic nucleus

More from Merriam-Webster on beta particle

Rhyming Dictionary: Words that rhyme with beta particle Encyclopedia article about beta particle

Comments on beta particle

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


authorized for issue (as a bond)

Get Word of the Day daily email!

Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Spell It

Can you spell these 10 commonly misspelled words?


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

Love words? Need even more definitions?

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