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
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
Fine particulate matter air pollution, or tiny particles measuring less than 2.5 micrometers in diameter—30 times thinner than a human hair—reached levels over 16 times the safe limit.
—Olivia Ferrari, Smithsonian Magazine, 16 July 2024
The Shoji Takeuchi Research Group at the University of Tokyo
In practice, the rotator seems to work as described, spinning at an average speed of about 20 to 40 micrometers per second.
—Michael Irving, New Atlas, 10 July 2024
See all Example Sentences for micrometer 
Noun
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
Fine particulate matter air pollution, or tiny particles measuring less than 2.5 micrometers in diameter—30 times thinner than a human hair—reached levels over 16 times the safe limit.
—Olivia Ferrari, Smithsonian Magazine, 16 July 2024
The Shoji Takeuchi Research Group at the University of Tokyo
In practice, the rotator seems to work as described, spinning at an average speed of about 20 to 40 micrometers per second.
—Michael Irving, New Atlas, 10 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 11 Sep. 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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