nanoparticle

noun

: a microscopic particle whose size is measured in nanometers

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Nanoparticles of a material usually have very different qualities from those that the material has at its ordinary scale, which is one reason why there's such excitement about the possibilities for how they might be used in future technologies. Many uses have already been developed. Aluminum nanoparticles added to rocket fuel can make the fuel burn twice as fast and release much more energy. Silicon nanoparticles are increasing the energy efficiency of solar cells by allowing the energy from ultraviolet light to be captured for the first time. Other nanoparticles are now helping prevent rust in metals, produce stronger batteries, enhance the diagnosis of cancer, and improve the filtering of water, and the number of other applications is growing fast.

Examples of nanoparticle in a Sentence

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Researchers constructed a hollow fiber membrane lined on the outside with palladium nanoparticles rather than attacking PFAS in open water. — Mrigakshi Dixit, Interesting Engineering, 19 Oct. 2026 Everyday actions generate billions of these nanoparticles, Yan noted, from washing a load of laundry to reheating a dish in the microwave. — Corinne Purtill, Los Angeles Times, 17 Oct. 2026 The same mass of plastic broken into nanoparticles has far more surface area, which might make the effect larger. — Jacek Krywko, ArsTechnica, 15 Oct. 2026 Mixed into a suspension of cellulose nanoparticles and then frozen, the customised chimera formed a flexible molecular skeleton that dramatically increases the tensile strength of the surrounding ice. — Mike McRae 16, New Atlas, 16 Sep. 2026 See All Example Sentences for nanoparticle

Word History

First Known Use

1983, in the meaning defined above

Time Traveler
The first known use of nanoparticle was in 1983

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Cite this Entry

“Nanoparticle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nanoparticle. Accessed 20 Oct. 2026.

Medical Definition

nanoparticle

noun
: a microscopic particle whose size is measured in nanometers
drugs bound to biodegradable polymeric nanoparticles

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