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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Now, using a system designed and built by the Fraunhofer Center for Applied Photonics in Glasgow, Vector Photonics’ PCSELs transmitted data through open air at the near-infrared wavelength of 1310 nanometers—in telecom’s O-band, a familiar wavelength for fiber-optic communications. IEEE Spectrum, 7 May 2026 How Circadian Lighting Works Specialized cells in the retina are tuned to short-wavelength blue light around 480 nanometers and send signals straight to the master clock, telling it when to release melatonin and when to suppress it. Allison Palmer, Kansas City Star, 7 May 2026 Marine researcher Marcus Eriksen, one of three scientists invited to speak alongside Kennedy and Zeldin at the April EPA announcement, wrote in the Ventura County Star that nanoplastics have now been confirmed in brain, liver and kidney tissue, with particles as small as 200 nanometers. Allison Palmer, Sacbee.com, 30 Apr. 2026 Marine researcher Marcus Eriksen, one of three scientists invited to speak alongside Kennedy and Zeldin at the April announcement, wrote in the Ventura County Star that nanoplastics have now been confirmed in brain, liver and kidney tissue, with particles as small as 200 nanometers. Allison Palmer, Miami Herald, 27 Apr. 2026 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

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Cite this Entry

“Nanometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nanometer. Accessed 10 May. 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

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