phonon

noun

pho·​non ˈfō-ˌnän How to pronounce phonon (audio)
: a quantum of vibrational energy (as in a crystal)

Examples of phonon in a Sentence

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By combining neutron-scattering data with thermal conductivity measurements, the researchers directly linked the improved heat flow to longer-lasting phonons traveling through the crystal lattice. Prabhat Ranjan Mishra, Interesting Engineering, 9 Mar. 2026 Their conductivity is limited by the strong interactions between free-moving electrons and atomic vibrations called phonons. Abhimanyu Ghoshal, New Atlas, 27 Jan. 2026 Intermixing at the interface between the diamond and silicon nitride led to the formation of silicon carbide, which acted as a kind of bridge for the phonons, allowing more efficient heat transfer. IEEE Spectrum, 20 Oct. 2025 Then the electron grid relaxes, and its ripples pair electrons the way phonons do. Charlie Wood, WIRED, 12 Jan. 2025 See All Example Sentences for phonon

Word History

Etymology

borrowed from Russian fonon, from Greek phōnḗ "sound made by something living, voice" + Russian -on -on entry 2 — more at phono-

First Known Use

1932, in the meaning defined above

Time Traveler
The first known use of phonon was in 1932

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Cite this Entry

“Phonon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phonon. Accessed 13 Mar. 2026.

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