noun
a very small particle with dimensions in the nanometer range, typically consisting of a few atoms or molecules
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The researchers studied the behavior of the nanoparticle in different environments.
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I heard that nanoparticle technology is really advanced these days.
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Have you seen the latest nanoparticle gizmo? It's pretty cool.
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The nanoparticle of hope seemed to be fading as the situation worsened.