light quantum

noun

: photon
especially : one of luminous radiation

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of light quantum was in 1925

Dictionary Entries Near light quantum

Cite this Entry

“Light quantum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20quantum. Accessed 25 Dec. 2024.

More from Merriam-Webster on light quantum

Love words? Need even more definitions?

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