micrometer

noun (1)
mi·​crom·​e·​ter | \ mī-ˈkrä-mə-tər How to pronounce micrometer (audio) \

Definition of micrometer

 (Entry 1 of 2)

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

micrometer

noun (2)
mi·​cro·​me·​ter | \ ˈmī-krō-ˌmē-tər How to pronounce micrometer (audio) \

Definition of micrometer (Entry 2 of 2)

: a unit of length equal to one millionth of a meter

called also micron

— see Metric System Table

Illustration of micrometer

Illustration of micrometer

Noun (1)

micrometer 2

In the meaning defined above

First Known Use of micrometer

Noun (1)

1670, in the meaning defined at sense 1

Noun (2)

1880, in the meaning defined above

History and Etymology for micrometer

Noun (1)

French micromètre, from micr- + -mètre -meter

Noun (2)

International Scientific Vocabulary micr- + meter entry 3

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The first known use of micrometer was in 1670

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More Definitions for micrometer

micrometer

noun
mi·​crom·​e·​ter | \ mī-ˈkrä-mə-tər How to pronounce micrometer (audio) \

Kids Definition of micrometer

1 : an instrument used with a telescope or microscope for measuring very small distances
2 : an instrument having a rod moved by fine screw threads and used for making exact measurements

micrometer

noun
mi·​crom·​e·​ter | \ mī-ˈkräm-ət-ər How to pronounce micrometer (audio) \

Medical Definition of micrometer

 (Entry 1 of 2)

: an instrument used with a telescope or microscope for measuring minute distances

micrometer

noun
mi·​cro·​me·​ter
variants: or chiefly British micrometre \ ˈmī-​krō-​ˌmēt-​ər How to pronounce micrometre (audio) \

Medical Definition of micrometer (Entry 2 of 2)

: micron

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More from Merriam-Webster on micrometer

Rhyming Dictionary: Words that rhyme with micrometer

Spanish Central: Translation of micrometer

Nglish: Translation of micrometer for Spanish Speakers

Britannica English: Translation of micrometer for Arabic Speakers

Britannica.com: Encyclopedia article about micrometer

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