nanometer

noun

nano·​me·​ter ˈna-nə-ˌmē-tər How to pronounce nanometer (audio)
: one billionth of a meter

Examples of nanometer in a Sentence

Recent Examples on the Web
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Those are tiny, membranous particles, ranging from 10 microns down to 20 nanometers, that exit cells and dwell in the spaces among them. New Atlas, 4 Jan. 2026 Stanford professor Srabanti Chowdhury explained how her team has come up with a way to grow diamonds inside ICs, mere nanometers from heat generating transistors. IEEE Spectrum, 30 Dec. 2025 Inside the smoke cloud, researchers detected aerosols roughly 500 nanometers wide — about twice the size of typical wildfire aerosols at lower altitudes. Stefanie Waldek, Space.com, 16 Dec. 2025 Important applications in industry This is because the microstructure of the aerogel is something akin to a nanofiber network comprised of fibres around 250 nanometers thick. Christopher McFadden, Interesting Engineering, 13 Dec. 2025 See All Example Sentences for nanometer

Word History

Etymology

International Scientific Vocabulary

First Known Use

1963, in the meaning defined above

Time Traveler
The first known use of nanometer was in 1963

Browse Nearby Words

Cite this Entry

“Nanometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nanometer. Accessed 6 Jan. 2026.

Kids Definition

nanometer

noun
nano·​meter
ˈnan-ə-ˌmēt-ər
: one billionth of a meter

Medical Definition

nanometer

noun
nano·​me·​ter
variants or chiefly British nanometre
: one billionth of a meter
abbreviation nm

More from Merriam-Webster on nanometer

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