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
Discover Magazine, 20 May 2025
The sites hawk their wares with scientific specificity: microprinting in dots per inch, card thickness in micrometers (polycarbonate stock for that stiff, authentic feel) and various types of laminates.
—Kaja Andric, New York Times, 13 Feb. 2025
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
See All Example Sentences for micrometer
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Noun
Shark Inspiration for Materials The research team applied pressure to microscopic pieces of the shark’s vertebrae and found deformations, smaller than one micrometer.
—Discover Magazine, 20 May 2025
The sites hawk their wares with scientific specificity: microprinting in dots per inch, card thickness in micrometers (polycarbonate stock for that stiff, authentic feel) and various types of laminates.
—Kaja Andric, New York Times, 13 Feb. 2025
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
See All Example Sentences for micrometer
Cite this Entry
“Micrometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometer. Accessed 15 Jun. 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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