particle
ˈpɑːtɪk(ə)l/
noun
noun: particle; plural noun: particles
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a minute portion of matter.„tiny particles of dust“
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Physicsany of numerous subatomic constituents of the physical world that interact with each other, including electrons, neutrinos, photons, and alpha particles.noun: subatomic particle; plural noun: subatomic particles; noun: elementary particle; plural noun: elementary particles
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Mathematicsa hypothetical object having mass but no physical size.
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the least possible amount.„he agrees without hearing the least particle of evidence“