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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To measure growth there, Yunker used white light interferometry, a technique that uses the interference patterns of light waves to measure physical characteristics with nanometer resolution. Carrie Arnold, Quanta Magazine, 21 Apr. 2025 The device emits red light at 630 nanometers and an intensity meant to enhance sleep quality and promote more restful sleep. Maggie Ryan, Flow Space, 2 Mar. 2025 For example, a pure red may consist of photons that all share the same wavelength near 620 nanometers. Michael J. Murdoch, The Conversation, 3 Feb. 2025 One aspect of these models concerns particles within clouds, which are sometimes only nanometers wide, that need to be scaled up and measured across the surface of the Earth. Tom Brown, Space.com, 16 Mar. 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

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Cite this Entry

“Nanometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nanometer. Accessed 6 May. 2025.

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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