Meaning of PARTICLE in English

PARTICLE

/ ˈpɑːtɪkl; NAmE ˈpɑːrt-/ noun

1.

a very small piece of sth :

particles of dust

dust particles

There was not a particle of evidence (= no evidence at all) to support the case.

2.

( physics ) a very small piece of matter, such as an electron or proton , that is part of an atom

—see also alpha particle , elementary particle

3.

( grammar ) an adverb or a preposition that can combine with a verb to make a phrasal verb :

In 'She tore up the letter', the word 'up' is a particle.

—see also adverbial particle

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WORD ORIGIN

late Middle English : from Latin particula little part, diminutive of pars , part- .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.