particle

[pahr´tĭ-k'l]

an extremely small mass of material.

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]

Farlex Partner Medical Dictionary © Farlex 2012

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]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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]

Medical Dictionary for the Dental Professions © Farlex 2012

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References in periodicals archive

They found that during STEVE, a flowing "river" of charged particles in Earth's ionosphere collide, creating friction that heats the particles and causes them to emit mauve light.

What Powers Celestial Phenomenon STEVE

In the later studies, Haitch, Rueda and Puthoff [23] studied an accelerated charged particle under the influence of zeropint field and obtained a relation for inertial mass of a charged particle which is similar to (3).

Mass of a charged particle with complex structure in zeropoint field

Figures in Table 2 demonstrate that during the interaction of a fast moving charged particle with a nucleus (at r ~ [10.sup.-12] cm) the orientation of the spin of the target nucleus takes as little time as ~ [10.sup.-26] seconds.

On the possible mechanism of interaction of high-energy particles with nuclei

SIMION 3D calculates the charged particle's trajectory using a time-adaptive, 4th order Runge-Kutta algorithm to solve the equation of motion in three dimensions.

Simulation of charged particle trajectories in the neutron decay correlation experiment abBA

The ionization chamber technique is employed to convert neutrons to charged particles in a large spatial region.

Development of a position sensitive neutron detector with high efficiency and energy resolution for use at high-flux beam sources

THESE X-RAY IMAGES of two pulsars (top two panels) show beautiful, complex clouds of charged particles created as the spinning neutron stars move through space.

Two pulsars blowing in the wind

Known as the Aurora Borealis or Northern Lights, they are caused by a sudden ejection of charged particles by the Sun.

Dancing Lights In The Night Sky

The researchers said that such charged particles twirl and gyrate around the magnetic field lines created by the vast magnetic systems that surround the Sun and Earth.

NASA discovers fast neutrons emitting from Sun's outer layer

The display is caused by electrically charged particles from the sun entering the earth's atmosphere.

Northern Lights over the Midlands..

They sometimes form when bursts of charged particles from the sun crash into Earth's magnetic field.

Surprising skylight