Illustration of micrometer
- micrometer 2
mi·crom·e·ter
mī-ˈkrä-mə-tər 
1
: an instrument used with a telescope or microscope for measuring minute distances
2
: a caliper for making precise measurements that has a spindle moved by a finely threaded screw
mi·cro·me·ter
ˈmī-krō-ˌmē-tər
: a unit of length equal to one millionth of a meter
called also micron
see Metric System TableExamples of micrometer in a Sentence
Recent Examples on the Web
Sharmila Kuthunur, Space.com, 18 Dec. 2024
It is limited ultimately by the resolution of timing devices but nevertheless achieves accuracies of tens of micrometers over many kilometers.
—The Physics Arxiv Blog, Discover Magazine, 16 Dec. 2024
The walls of the maze, captured with a scanning electron microscope, are only micrometers (one-millionth of a meter) long.
—IEEE Spectrum, 2 Dec. 2024
The maximum size of fine inhalable particles is 2.5 micrometers.
—Medea Giordano, WIRED, 17 Nov. 2022
See all Example Sentences for micrometer 
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Noun
In contrast, the new measurements, which were gathered at a different wavelength of 12.8 micrometers, suggest not only a thick, carbon dioxide-rich atmosphere but one that includes highly reflective haze, akin to smog seen here on Earth.
—Sharmila Kuthunur, Space.com, 18 Dec. 2024
It is limited ultimately by the resolution of timing devices but nevertheless achieves accuracies of tens of micrometers over many kilometers.
—The Physics Arxiv Blog, Discover Magazine, 16 Dec. 2024
The walls of the maze, captured with a scanning electron microscope, are only micrometers (one-millionth of a meter) long.
—IEEE Spectrum, 2 Dec. 2024
The maximum size of fine inhalable particles is 2.5 micrometers.
—Medea Giordano, WIRED, 17 Nov. 2022
See all Example Sentences for micrometer
Dictionary Entries Near micrometer
Cite this Entry
“Micrometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometer. Accessed 18 Jan. 2025.
Copy CitationKids Definition
micrometer
1 of 2 noun
mi·crom·e·ter
mī-ˈkräm-ət-ər
1
: an instrument used with a telescope or microscope for measuring very small distances
micrometry
noun
-ˈkräm-ə-trē
micrometer
2 of 2 noun
mi·cro·me·ter
ˈmī-krō-ˌmēt-ər
: a unit of length equal to one millionth of a meter
Medical Definition
micrometer
1 of 2 noun
mi·crom·e·ter
mī-ˈkräm-ət-ər
: an instrument used with a telescope or microscope for measuring minute distances
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