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micrometer

micrometer

2 4.8
A unit of length equal to one millionth of a meter
  • noun
  • /ˈmaɪkrəˌmɪtər/
  • Specialized
translation icon : micrómetro
  • The base of the pyramidal tip is about 5 micrometers across.
  • micrometers thick
  • micrometer scale
  • less than one micrometer

Examples

  • With cantilevers of 100 micrometers or longer, these concerns are usually not significant.

    Academic text (1995)
  • Most micrometeorites are only a few hundred micrometers across, about the diameter of a human hair.

    Academic text (2001)
  • The spot size in optical recording has a diameter of less than a micrometer.

    Academic text (1996)
  • And you wouldn't have to have somebody calling out a measurement by reading a little micrometer scale by eye.

  • Thin films have been developed that are only a few micrometers thick.

    Academic text (1993)
  • The smallest marks for this set of experiments were about 0.3 micrometers across.

    Academic text (1995)
  • The average statistical errors from print to print were typically 0.8 micrometers or 12 ppm.

    Academic text (2001)
  • Its reflector, 12 meters across, deviates no more than 15 micrometers from a perfect parabola.

    Academic text (1996)
  • Each conductor layer and each insulator layer in the multilevel interconnection wiring is 6 micrometers thick.

    Academic text (1998)
  • The technician used a micrometer to measure the thickness of the metal layer precisely.

Synonyms

micron
vsmicrometer
  • Specialized
15 6.9

A unit of length equal to one millionth of a meter for measuring very small things like dust particles

is the same unit but considered an alternative technical name

Compounds

micrometer caliper
  • Specialized
7.4

A small tool for measuring tiny distances or thicknesses accurately

micrometer gauge
  • Specialized
7.3

A tool that measures very small distances or thicknesses using a fine screw

vernier micrometer
  • Specialized
9.1

A small tool with a fine scale that measures very small distances accurately

How Small

micromicron
  • Archaic
9.9
nanometer
  • Specialized
7 4.8
micrometer
  • Specialized
2 4.8
millimeter
  • Specialized
140 2.5
centimeter
  • US
92 1.0
meter
  • Specialized
621 1.0
kilometer
  • US
572 1.8

Surface Forms

micrometer singular
micrometers plural

Morphology

micrometer = meter (transparent) = micro + meter

The meaning is directly compositional: micro- indicates one millionth and meter names the unit of length.

Etymology

Micrometer comes from the parts micro- 'small' and -meter 'measure'. So a micrometer is literally a 'small measure', which is why it names the unit equal to one millionth of a meter.