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
John Timmer, Ars Technica, 24 Sep. 2024
Samples from eight of the cadavers contained microplastics — tiny bits of plastic that ranged from 5.5 micrometers to 26.4 micrometers in size.
—Kaitlin Sullivan, NBC News, 16 Sep. 2024
Sixteen plastic fibers and particles were found in the eight brains and ranged from 5.5 micrometers—smaller than the diameter of a human red blood cell—to 26.4 micrometers in size.
—Ty Roush, Forbes, 16 Sep. 2024
Unable to see the smallest particles The new study, published Monday in the journal JAMA Network Open, found microplastics in the olfactory bulbs of eight of 15 cadavers that ranged in size from 5.5 micrometers, or 0.000217 of an inch, to 26.4 micrometers, or 0.001039 of an inch.
—Sandee Lamotte, CNN, 16 Sep. 2024
See all Example Sentences for micrometer 
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Noun
This process erodes a bit under 25 micrometers of the rock's surface before ending at 0.05 microseconds when the radiation from the Z machine fades out.
—John Timmer, Ars Technica, 24 Sep. 2024
Samples from eight of the cadavers contained microplastics — tiny bits of plastic that ranged from 5.5 micrometers to 26.4 micrometers in size.
—Kaitlin Sullivan, NBC News, 16 Sep. 2024
Sixteen plastic fibers and particles were found in the eight brains and ranged from 5.5 micrometers—smaller than the diameter of a human red blood cell—to 26.4 micrometers in size.
—Ty Roush, Forbes, 16 Sep. 2024
Unable to see the smallest particles The new study, published Monday in the journal JAMA Network Open, found microplastics in the olfactory bulbs of eight of 15 cadavers that ranged in size from 5.5 micrometers, or 0.000217 of an inch, to 26.4 micrometers, or 0.001039 of an inch.
—Sandee Lamotte, CNN, 16 Sep. 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 Nov. 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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