particle

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particle

 [pahr´tĭ-k'l]
an extremely small mass of material.
alpha p's see alpha particles.
beta p's see beta particles.
Dane particle an intact hepatitis B virion.
elementary particle any of the subatomic particles, including electrons, protons, neutrons, positrons, neutrinos, and muons.

par·ti·cle

(par'ti-kĕl),
1. A small piece or portion of anything.
2. An elementary particle such as a proton or electron.
[L. particula, dim. of pars, part]

par·ti·cle

(pahr'ti-kĕl)
1. A small piece or portion of anything.
2. An elementary particle such as a proton or electron.
[L. particula, dim. of pars, part]

par·ti·cle

(pahr'ti-kĕl)
1. A small piece or portion of anything.
2. An elementary particle such as a proton or electron.
[L. particula, dim. of pars, part]