: a quantum of vibrational energy (as in a crystal)
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These phonons can pile up at the boundary between materials, resisting the flow of heat.—IEEE Spectrum, 20 Oct. 2025 The result was the appearance of three distinct hybrid quantum states known as phonon-polaritons, the new blends of vibration and light.—Neetika Walter, Interesting Engineering, 30 Sep. 2025 Then the electron grid relaxes, and its ripples pair electrons the way phonons do.—Charlie Wood, WIRED, 12 Jan. 2025 Because the atoms are so tightly packed, vibrations within the crystal structure, called phonons, can dissipate heat extremely efficiently.—New Atlas, 30 Nov. 2024 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 -on entry 2 — more at phono-
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