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]

particle

/par·ti·cle/ (pahr´tĭ-k'l) a tiny mass of material.
Dane particle  an intact hepatitis B viral particle.
elementary particles of mitochondria  numerous minute, club-shaped granules with spherical heads attached to the inner membrane of a mitochondrion.
viral particle , virus particle virion.

particle

[pär′tikəl]
Etymology: L, particula, small part
1 any fundamental unit of matter.
2 a minute fragment or speck.

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]

particle

an extremely small mass of material. See also alpha particles and beta particle.

elementary particle
any of the subatomic particles, including electrons, protons, neutrons, positrons, neutrinos and muons.
References in periodicals archive ?
On electron microscopy, the viral particles appear as bullet-shaped structures with an average length of 180 nm and a diameter of 25 to 100 nm.
While attempts at visualizing the viral particles by direct EM and SPIEM were inconclusive, the findings herein are consistent with the proposed etiology (9, 19).
Pigs seem to give off more aerosolized viral particles than other species, says Derek Gatherer, a viral evolutionary biologist at Lancaster University in England.
Thompson, PhD, GlobalData's Senior Analyst covering in vitro diagnostics, states that flawed equipment, the lack of technology for accurately detecting viral particles in breath, and the narrow window during which MERS sufferers shed viral particles are the most significant obstacles to successful airport scanning for MERS.
It consists of dead viral particles that stimulate the production of antibodies.
His team is trying to identify viral particles that elicit the best response when confronted by immune forces.
A large number of viral particles were observed in renal epithelial cells (online Technical Appendix Figure 1, panel G).
Intracytoplasmic inclusions, a characteristic of this virus, were observed in some of these cells, and viral particles were characterized by electron microscopy.
It takes only a small amount of the virus to cause infection, and the amount of virus shed by an infected cat is tremendous--probably anywhere from one billion to 10 billion viral particles per gram of fecal matter, urine or other secretions.
The next most costly test - for HIV antigens, the viral particles that cause HIV - costs about $5 per pint.
An editorial note accompanying the report said the data suggest that measles is no longer endemic in the United States and that most cases are related to foreign visitors shedding viral particles.
But that has been because the peptides or viral particles used in the vaccines to provoke a response, when simply released into circulation, have not been taken up properly by antigen-presenting cells of the immune system.