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
New Atlas, 5 Nov. 2025
In animal trials, the devices successfully navigated through the circulatory system and reached target brain regions autonomously, delivering localized stimulation with micrometer precision.
—Neetika Walter, Interesting Engineering, 5 Nov. 2025
This enables the creation of pixels that are approximately 560 nanometers across, as opposed to the five-micrometer diameter of even micro-OLED pixels.
—PC Magazine, 4 Nov. 2025
The device uses a tiny 2 millimeter by 2 millimeter photovoltaic implant that is only 30 micrometers thick, and thinner than a strand of hair.
—Kurt Knutsson, FOXNews.com, 28 Oct. 2025
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
What's more, the ELR layer was only a few micrometers thick – thinner than natural enamel – so its long-term durability is unknown.
—New Atlas, 5 Nov. 2025
In animal trials, the devices successfully navigated through the circulatory system and reached target brain regions autonomously, delivering localized stimulation with micrometer precision.
—Neetika Walter, Interesting Engineering, 5 Nov. 2025
This enables the creation of pixels that are approximately 560 nanometers across, as opposed to the five-micrometer diameter of even micro-OLED pixels.
—PC Magazine, 4 Nov. 2025
The device uses a tiny 2 millimeter by 2 millimeter photovoltaic implant that is only 30 micrometers thick, and thinner than a strand of hair.
—Kurt Knutsson, FOXNews.com, 28 Oct. 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 13 Nov. 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