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
IEEE Spectrum, 18 Dec. 2024
However, mid-infrared light contains waves between 3 and 30 micrometers and is invisible to human eyes.
—Toshi Hirabayashi, Discover Magazine, 5 Dec. 2024
Those channels ranged in width from 150 micrometers for the main roots, down to approximately 8 micrometers for hairs that branched off of those roots.
—Ben Coxworth, New Atlas, 24 Nov. 2024
Some of this particulate matter measures 2.5 micrometers or smaller in size—that's less than 0.0001 inch—and is called PM2.5.
—John Mac Ghlionn, Newsweek, 14 Jan. 2025
See all Example Sentences for micrometer 
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Noun
In this design, the researchers ran copper wire with a 75 micrometer diameter through the electrode, matching the copper catalyst layer to eliminate the risk of electrolysis between dissimilar metals.
—IEEE Spectrum, 18 Dec. 2024
However, mid-infrared light contains waves between 3 and 30 micrometers and is invisible to human eyes.
—Toshi Hirabayashi, Discover Magazine, 5 Dec. 2024
Those channels ranged in width from 150 micrometers for the main roots, down to approximately 8 micrometers for hairs that branched off of those roots.
—Ben Coxworth, New Atlas, 24 Nov. 2024
Some of this particulate matter measures 2.5 micrometers or smaller in size—that's less than 0.0001 inch—and is called PM2.5.
—John Mac Ghlionn, Newsweek, 14 Jan. 2025
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 9 Feb. 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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