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
Victoria Corless, Space.com, 5 Feb. 2025
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
See all Example Sentences for micrometer 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Noun
Typically, the average choroidal thickness in healthy adults is between 200 and 300 micrometers.
—Victoria Corless, Space.com, 5 Feb. 2025
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
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 22 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share