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
Michael Irving, New Atlas, 30 Mar. 2025
The slice of rock mounted on the glass slide is only ~30 micrometers (~0.001 inches) thick.
—Erik Klemetti, Discover Magazine, 25 Mar. 2025
In their desperate meandering, some larvae—which measure 500 to 600 micrometers (0.05 to 0.06 centimeters) long—will travel several centimeters each day.
—Ars Technica, 21 Feb. 2025
That's because these flecks are in fact around 10 micrometers wide – or a fifth the width of a human hair.
—New Atlas, 4 Apr. 2025
See All Example Sentences for micrometer
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Noun
The most advanced of these are called micro-LED displays, which boast, as the name suggests, pixels on the scale of micrometers.
—Michael Irving, New Atlas, 30 Mar. 2025
The slice of rock mounted on the glass slide is only ~30 micrometers (~0.001 inches) thick.
—Erik Klemetti, Discover Magazine, 25 Mar. 2025
In their desperate meandering, some larvae—which measure 500 to 600 micrometers (0.05 to 0.06 centimeters) long—will travel several centimeters each day.
—Ars Technica, 21 Feb. 2025
That's because these flecks are in fact around 10 micrometers wide – or a fifth the width of a human hair.
—New Atlas, 4 Apr. 2025
See All Example Sentences for micrometer
Cite this Entry
“Micrometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometer. Accessed 3 May. 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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