noun
1. A very small piece or part; a tiny portion or speck.
noun
2. A very small or the smallest possible amount, trace, or degree: not a particle of doubt.
noun
3. Physics A body whose spatial extent and internal motion and structure, if any, are irrelevant in a specific problem.
noun
4. Physics An elementary particle.
noun
5. Physics A subatomic particle. See Table at subatomic particle.
example
6. _The vast emptiness which surrounds the universe, was not filled with things seen, with sun or moon or stars; it stretched boundless, penetrating everywhere, disuniting everything, body from body, particle from particle_.
example
7. The same phenomenon occurs when the gamma particle is absorbed in the receiving nucleus.
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8. Hm. Instead, they use some very beautiful dimensional analysis to come up with a new dimensionless parameter, what they call the particle momentum number Pa, which seems to capture more of the physics here - for very large and very small values of Pa, the particles augment turbulence, while for an intermediate range of Pa turbulence is attenuated.
