noun

definition

A very small piece of matter, a fragment; especially, the smallest possible part of something.

definition

Any of various physical objects making up the constituent parts of an atom; an elementary particle or subatomic particle.

definition

A word that has a particular grammatical function but does not obviously belong to any particular part of speech, such as the word to in English infinitives or O as a vocative particle.

definition

A part of speech which cannot be inflected: an adverb, preposition, conjunction or interjection.

definition

In the Roman Catholic church, a crumb of consecrated bread; also the smaller breads used in the communion of the laity.

Examples of particle in a Sentence

Let x, y, z be the co-ordinates of any particle of the medium in its natural state, and, 7 7, the displacements of the same particle at the end of time t, measured in the directions of the three axes respectively.

A particle of this mass is easily visible microscopically, and a velocity of 2 mm.

It remained a desideratum to express by equations the motion of a particle of the fluid in any assigned direction.

In starting the furnace, the bottom is prepared by ramming it with charcoal-powder that has been soaked in milk of lime and dried, so that each particle is coated with a film of lime, which serves to reduce the loss of current by conduction through the lining when the furnace becomes hot.

On account of the smallness of the particles, the forces acting throughout the volume of any individual particle are all of the same intensity and direction, and may be considered as a whole.

When the fluids inside a particle were mixed together, the particle was neutral; when they were more or less completely separated, the particle became magnetized to an intensity depending upon the magnetic force applied; the whole body therefore consisted of a number of little spheres having north and south poles, each of which exerted an elementary action at a distance.

The word "alcohol" is of Arabic origin, being derived from the particle al and the word kohl, an impalpable powder used in the East for painting the eyebrows.

We may now investigate the mathematical expression for the disturbance propagated in any direction from a small particle upon which a beam of light strikes.

Finally, in a celebrated memoir, Theorie des attractions des spheroides et de la figure des planetes, published in 1785 among the Paris Memoirs for the year 1782, although written after the treatise of 1784, Laplace treated exhaustively the general problem of the attraction of any spheroid upon a particle situated outside or upon its surface.

Thrombosis is an accident of not dissimilar character, whereby a vessel is blocked not by a travelling particle, but by a clotting of the blood in situ, probably on the occasion of some harm to the epithelial lining of the vessel.

Each bombardment will, however, change the motion of the particle, so that changes are too frequent for the separate motions to be individually visible.

An intelligent creature, or "demon," possessed of unlimited powers of vision, is placed in charge of each door, with instructions to open the door whenever a particle in A comes towards it with more than a certain velocity V, and to keep it closed against all particles in A moving with less than this velocity, but, on the other hand, to open the door whenever a particle in B approaches it with less than a certain velocity v, which is not greater than V, and to keep it closed against all particles in B moving with a greater velocity than this.

The growth of an organic being is simply a process of enlargement, as a particle of dry gelatine may be swelled up by the intussusception of water; its death is a shrinkage, such as the swelled jelly might undergo on desiccation.

Of the former, the first, published in 1896, was on the dynamics of a particle; and afterwards there followed a number of concise treatises on thermodynamics, heat, light, properties of matter and dynamics, together with an admirably lucid volume of popular lectures on Recent Advances in Physical Science.

Within a quarter of an hour after a quantity of cinnabar has been injected into the blood of the frog nearly every particle will be found engulfed by the protoplasm of the leucocytes of the circulating blood.

The only circumstance which physics has to consider is the transference of movement from one particle to another, and the change of its direction.

Two typical forms are in use; in one a liquid is prepared in which the crystal freely swims, the density of the liquid being ascertained by the pycnometer or other methods; in the other a liquid of variable density, the so-called "diffusion column," is prepared, and observation is made of the level at which the particle comes to rest.

In the Eulerian method the attention is fixed on a particular point of space, and the change is observed there of pressure, density and velocity, which takes place during the motion; but in the Lagrangian method we follow up a particle of fluid and observe how it changes.

By his discovery that the attracting force in any direction of a mass upon a particle could be obtained by the direct process of differentiating a single function, Laplace laid the foundations of the mathematical sciences of heat, electricity and magnetism.

Other writers have derived the word from the Arabic particle al (the definite article), and geber, meaning " man."

Probably the size of the particle will be slightly reduced.

If the particle enveloped by the protoplasm be of an organic nature, such as a bacterium, it undergoes digestion, and ultimately becomes destroyed, and accordingly the term " phagocyte " is now in common use to indicate cells having the above properties.

But it can be shown that from the aggregation of these separate short motions the particle ought to have a resultant motion, described with an average velocity which, although much smaller than 2 mm.

A magnetizable substance was supposed to consist of an indefinite number of spherical particles, each containing equivalent quantities of the two fluids, which could move freely within a particle, but could never pass from one particle to another.

To clarify stock, remove every particle of fat.

Finally the word (confused not unnaturally with the particle usually attached to it) was borrowed by the West, and is the origin of the English "admiral."

Estimating suspended sediment concentrations from ocean color measurements in moderately turbid waters; the impact of variable particle scattering properties.

As the movement of one particle in a closely-packed universe is only possible if all other parts move simultaneously, so that the last in the series steps into the place of the first; and as the figure and division of the particles varies in each point in the universe, there will inevitably at the same instant result throughout the universe an innumerable host of more or less circular movements, and of vortices or whirlpools of material particles varying in size and velocity.

For instance, the well-known description (in chap. xlvii.) of the preposition " in " occurring in a theological dogma as a " momentous particle which the memory rather than the understanding must retain " is taken directly from the first Provincial Letter.

However, two differences between an orb and a dust particle are that dust has a defined nucleus while an orb is translucent, and dust tends to float while orbs "fly".

In a simple interrogative sentence the introductory particle before the verb is a, and the positive answer consists in a repetition of the verb; a ddaw Dafydd ?

Polypropylene can be made auxetic by compacting ultra high molecular weight PP powder, with a particle size of 30 to 120 microns.

This angular momentum leads to a magnetic moment of fixed size for each particle.

Many of their applications utilize the ability of these particles to stay firmly attached to oil-water interfaces, thus forming particle monolayers.

Martin Turner takes you on a journey from the motion of a microscopic particle to the creation of imaginary moonscapes.

The movement and deposition of rocks and particle debris by glaciers to form moraines is also discussed.

For example, there is a particle called the muon which is a heavier cousin of the electron.

Early in 1932 James Chadwick discovered the neutron, a particle in the nuclei of most atoms.

The neutron fluence rate depends upon factors such as target thickness, charged particle beam current, geometry and required neutron fluence rate depends upon factors such as target thickness, charged particle beam current, geometry and required neutron energy resolution.

Gasoline vehicles are better for human health with their lower NOx and particle emissions.

The alpha particle is a helium nucleus - one of the products of a nuclear fission.

As the particle passes through the beam, a secondary " pulse " signal is generated by a single optical fiber.

For example, in the bulk palladium, less than 4% of the palladium atoms were on surface of the particle.

Particle Accelerators are devices used to accelerate charged elementary particle Accelerators are devices used to accelerate charged elementary particles or ions to high energies.

Some speculate that the high-energy particles are not protons at all but some exotic new particle.

The LHC will be the world's most powerful particle accelerator.

Next year the nuclear research institute at CERN will start using the largest particle accelerator in the world.

However, it is widely felt that the standard model is incomplete (hence the need to build ever more powerful particle accelerators ).

Particle physicists are waiting for 2007 when a new particle accelerator opens in the world's largest particle physics laboratory, CERN.

About GridPP UK particle physicists are builing a computing Grid, to analyze the data deluge from CERN's next particle accelerator.

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