noun
Freq #133743
Meanings
-
1
noun
A tool for measuring very small distances, such as thickness or diameter, with great precision.
The engineer used a micrometer to check the thickness of the metal sheet.
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2
noun
A unit of length equal to one millionth of a metre.
A human hair is about seventy micrometers wide.
Thesaurus
Synonyms
1
noun
· a tool for measuring very...
micrometer calipermicrometer gauge
2
noun
· a unit of length equal to...
micron
Word family
Forms
micrometers
Etymology
From micro- (“one millionth”) + meter.