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
Kaitlin Sullivan, NBC News, 16 Sep. 2024
On their own, single cells of algae can zip around at speeds of over 100 micrometers per second – about 10 body-lengths.
—Michael Irving, New Atlas, 10 July 2024
Normally, all red blood cells are about the same size, with a diameter of 6.2-8.2 micrometers (µm).2 Certain conditions, such as anemia, can lead to different sizes of your red blood cells.
—Suchandrima Bhowmik, Health, 3 Aug. 2024
While the signal from the planet was quite bright at a number of wavelengths, the planet couldn't even be detected in one area of the spectrum (3.5 to 5 micrometers, for the curious).
—John Timmer, Ars Technica, 24 July 2024
See all Example Sentences for micrometer 
Noun
The smallest were slimmer than the diameter of a human red blood cell, which measures about 8 micrometers.
—Kaitlin Sullivan, NBC News, 16 Sep. 2024
On their own, single cells of algae can zip around at speeds of over 100 micrometers per second – about 10 body-lengths.
—Michael Irving, New Atlas, 10 July 2024
Normally, all red blood cells are about the same size, with a diameter of 6.2-8.2 micrometers (µm).2 Certain conditions, such as anemia, can lead to different sizes of your red blood cells.
—Suchandrima Bhowmik, Health, 3 Aug. 2024
While the signal from the planet was quite bright at a number of wavelengths, the planet couldn't even be detected in one area of the spectrum (3.5 to 5 micrometers, for the curious).
—John Timmer, Ars Technica, 24 July 2024
See all Example Sentences for micrometer
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'micrometer.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near micrometer
Cite this Entry
“Micrometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometer. Accessed 2 Oct. 2024.
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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