粒子の定義と意味 - メリアム・ウェブスター

PARTICLE Definition & Meaning - Merriam-Webster Est. 1828 Dictionary Definition Definition Synonyms Example Sentences Word History Phrases Containing Rhymes Entries Near Cite this Entry Citation Kids Definition Kids Medical Definition Medical More from M-W Show more Show more Citation Kids Medical More from M-W Save Word To save this word, you'll need to log in. Log In particle noun par·​ti·​cle ˈpär-ti-kəl Synonyms of particle Simple Definition A Simple Definition is available from our Learner's Dictionary to help you understand the meaning faster. 1 a : a minute quantity or fragment b : a relatively small or the smallest discrete portion or amount of something 2 archaic : a clause or article of a composition or document 3 : any of the basic units of matter and energy (such as a molecule, atom, proton, electron, or photon) 4 : a unit of speech expressing some general aspect of meaning or some connective or limiting relation and including the articles, most prepositions and conjunctions, and some interjections and adverbs the particle up has a perfective meaning in phrases such as beat up and cut up 5 : a small eucharistic wafer distributed to a Roman Catholic layman at Communion Synonyms of particle Relevance speck sprinkling hint glimmer splash shred bit touch little trace lick See All Synonyms & Antonyms in Thesaurus Examples of particle in a Sentence There is not a particle of evidence to support their claim. There is not a particle of truth in what he said. The phrasal verb “look up” consists of the verb “look” and the adverbial particle “up.” Recent Examples on the Web Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback . But in the quantum realm, randomness reigns; a particle comes with multiple quantum states, collapsing to just one of them in unpredictable ways. — Quanta Magazine , 29 Apr. 2026 Nanoplastics are the very smallest particles , about 1,000th the average width of a human hair, and are most likely to get inside the human body. — Laura Paddison, CNN Money , 29 Apr. 2026 Engineers value emission indices (EI)—the number of particles (ice or soot) per kg of fuel burned—as metrics. — Srishti Gupta, Interesting Engineering , 29 Apr. 2026 However, O'Connor says your curtains and drapes still collect dust, pet dander, cooking odors, and other airborne particles that can affect indoor air quality. — Ashlyn Needham, Southern Living , 28 Apr. 2026 See All Example Sentences for particle Word History Etymology Middle English, from Latin particula , from diminutive of part-, pars First Known Use 14th century, in the meaning defined at sense 1a Time Traveler The first known use of particle was in the 14th century See more words from the same century Phrases Containing particle alpha particle beta particle elementary particle fundamental particle J / psi particle particle accelerator particle physics psi particle W particle Z particle Rhymes for particle article interparticle nanoparticle quasiparticle See All Rhymes for particle Browse Nearby Words participle particle particle accelerator See all Nearby Words Cite this Entry Style MLA Chicago APA Merriam-Webster “Particle.” Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/particle. Accessed 6 May. 2026. Copy Citation Kids Definition particle noun par·​ti·​cle ˈpärt-i-kəl 1 : one of the very small parts of matter (as a molecule, atom, or electron) 2 : a very small quantity or piece 3 : the smallest possible portion Medical Definition particle noun par·​ti·​cle ˈpärt-i-kəl 1 : one of the minute subdivisions of matter (as an atom or molecule) also : elementary particle 2 : a minute quantity or fragment More from Merriam-Webster on particle Nglish: Translation of particle for Spanish Speakers Last Updated: 30 Apr 2026 - Updated example sentences Love words? Need even more definitions? Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Merriam-Webster unabridged More from Merriam-Webster Word of the Day flamboyant See Definitions and Examples » Get Word of the Day daily email! 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