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1. Physics a body with finite mass that can be treated as having negligible size, and internal structure
3. RC Church a small piece broken off from the Host at Mass


See elementary particles.



a member of a lexical-grammatical class of words that express the attitude of the speaker toward an utterance and that may be used to produce certain grammatical forms. An auxiliary part of speech, the particle is not a sentence part.

Particles exist in many languages, and the Slavic languages have a rather extensive system. In Russian, particles are divided into several semantic-functional types. Syntactic particles are used in the formation of the subjunctive, imperative, and optative moods (by, pust’, da, davai, davaite). Negative particles include tie and ni. Subjective modal particles modify the sense of other words or entire sentences; they include intensive particles (ved’, dazhe, -to, zhe), emphatic particles (toi’ko, lish’), interrogative particles (razve, neuzheli, li), and exclamatory particles (kak, chto zd). Particles are also used as affixes in the formation of pronouns and adverbs (koe-, -libo, -nibud’, -to).


Grammatika sovremennogo russkogo literaturnogo iazyka. Moscow, 1970.
Vinogradov, V. V. Russkii iazyk, 2nd ed. Moscow, 1972.



(particle physics)
Any very small part of matter, such as a molecule, atom, or electron. Also known as fundamental particle.
Any relatively small subdivision of matter, ranging in diameter from a few angstroms (as with gas molecules) to a few millimeters (as with large raindrops).
References in periodicals archive ?
In this way, a new interpretation of quantum potential can be proposed: The idea that quantum potential has origin from this deeper level of reality, in which one assumes that physical space is a-temporal, composed by a net of QS having the size of Planck length (which represent its elementary grains), and in which one assumes that subatomic particles appear in virtue of the interaction of entropic energy with one or more QS.
A subatomic particle can also move forward in time-faster than light, or backward, which is impossible under classical physics.
If such a neutral particle existed, however, it would be difficult to detect, for the various devices for detecting subatomic particles all depended on the electric charge these particles carried.
To further confirm that the particle really is the Higgs boson, scientists at CERN have to measure the rate at which the boson decays into other subatomic particles.
In core-collapse supernovas, this core, which is called a neutron star, then rapidly generates a stream of subatomic particles that blows away the star's outer layers.
But those oppositely charged subatomic particles don't exist in nature, either.
At this time the most familiar device for detecting the paths of subatomic particles was the cloud chamber invented by Wilson (see 1911).
The Higgs boson is an important find because it answers the fundamental question of where mass comes from and completes the Standard Model of Physics, which describes much of what we know of the universe through the interactions of four fundamental forces and 12 subatomic particles.
As scientists were uncovering droves of new subatomic particles in the 1950s and 1960s, Feynman diagrams-as the drawings came to be known--offered a means for visualizing the unfamiliar entities and their interactions.
After all, as Lindley points out, his computer is ultimately made up of subatomic particles that depend on the laws of quantum mechanics.