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
Hayleigh Evans, The Arizona Republic, 16 Dec. 2024
Particulate matter less than 2.5 micrometers in size, PM2.5, sits at a concentration around 40 micrograms per cubic meter in Stockton, but the 2020 August Complex fires raised that level to more than 70 for multiple days.
—Noah Haggerty, Los Angeles Times, 1 Dec. 2024
Remarkably, all of our DNA can fit inside a cell’s nucleus, which is only a few micrometers long.
—William A. Haseltine, Forbes, 1 Nov. 2024
For now, the team has only printed tiny samples with a diameter of 3 centimeters, a length of 7 centimeters and a resolution of 15 micrometers, per New Scientist.
—Margherita Bassi, Smithsonian Magazine, 19 Nov. 2024
See all Example Sentences for micrometer 
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Noun
To put the size of these particles in perspective, the average human hair is roughly 70 micrometers in diameter, which is about 30 times larger than the largest fine particles of particulate matter.
—Hayleigh Evans, The Arizona Republic, 16 Dec. 2024
Particulate matter less than 2.5 micrometers in size, PM2.5, sits at a concentration around 40 micrograms per cubic meter in Stockton, but the 2020 August Complex fires raised that level to more than 70 for multiple days.
—Noah Haggerty, Los Angeles Times, 1 Dec. 2024
Remarkably, all of our DNA can fit inside a cell’s nucleus, which is only a few micrometers long.
—William A. Haseltine, Forbes, 1 Nov. 2024
For now, the team has only printed tiny samples with a diameter of 3 centimeters, a length of 7 centimeters and a resolution of 15 micrometers, per New Scientist.
—Margherita Bassi, Smithsonian Magazine, 19 Nov. 2024
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 31 Dec. 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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