quasar

noun

qua·​sar ˈkwā-ˌzär How to pronounce quasar (audio)
 also  -ˌsär
: a region at the center of a galaxy that produces an extremely large amount of radiation

Examples of quasar in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
But other sources, like quasars, supernovae and gamma ray bursts, can fire off particles at extremely high energies. Michael Irving, New Atlas, 29 Nov. 2024 Measurements of distances to quasars based on radio-interferometric techniques, for instance, are advancing, and there are prospects for using fluctuations in galaxy-surface brightness. Marc Kamionkowski, Scientific American, 15 Oct. 2024 Or at least a lot like quasars from more recent periods in the Universe's history. John Timmer, Ars Technica, 17 June 2024 Once activated, they are called active galactic nuclei, AGN, or quasars. Giuseppina Fabbiano, Discover Magazine, 31 May 2024 See all Example Sentences for quasar 

Word History

Etymology

quasi-stellar

First Known Use

1964, in the meaning defined above

Time Traveler
The first known use of quasar was in 1964

Dictionary Entries Near quasar

Cite this Entry

“Quasar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quasar. Accessed 21 Dec. 2024.

Kids Definition

quasar

noun
qua·​sar ˈkwā-ˌzär How to pronounce quasar (audio)
 also  -ˌsär
: any of the very distant starlike heavenly objects that give off very strong blue and ultraviolet light and powerful radio waves

More from Merriam-Webster on quasar

Last Updated: - Updated example sentences
Love words? Need even more definitions?

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