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quasiparticle

American

[kwey-zahy-pahr-ti-kuhl, kwey-sahy-, kwah-see, -zee-] / ˌkweɪ zaɪˈpɑr tɪ kəl, ˌkweɪ saɪ-, ˌkwɑ si, -zi- /

noun

Physics.

an entity, as an exciton or phonon, that interacts with elementary particles, but does not exist as a free particle.

Etymology

Origin of quasiparticle

First recorded in 1955–60; quasi- + particle

Example Sentences

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See Examples For:

quasiparticle

One widely used explanation is the quasiparticle model.

From Science Daily ● Feb. 8, 2026

"The material fluctuates between two different states, as if it cannot decide which one it wants to adopt. In this fluctuating regime, the quasiparticle picture is thought to lose its meaning."

From Science Daily ● Jan. 15, 2026

With their THz spectroscope, they observed that excited streams of electrons reflect off the edges to form a type of hybrid light-matter quasiparticle called a plasmon polariton.

From Science Daily ● Oct. 21, 2025

Inside a stark black building with tinted windows, Google researchers attempt to engineer the quasiparticle on supercooled chips encased in chilling systems that look like chandeliers.

From Science Magazine ● Dec. 20, 2023

If this Majorana quasiparticle could be corralled and controlled, the payoff would be twofold.

From Science Magazine ● Dec. 20, 2023

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023