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micrometer1

[mahy-krom-i-ter] /maɪˈkrɒm ɪ tər/
noun
1.
any of various devices for measuring minute distances, angles, etc., as in connection with a telescope or microscope.
2.
Also called mike, micrometer caliper. a precision instrument with a spindle moved by a finely threaded screw, for the measurement of thicknesses and short lengths, commonly used by machinists for turning shafts or boring holes.
Also, especially British, micrometre.
Origin
1660-1670
1660-70; micro- + -meter

micrometer2

[mahy-kroh-mee-ter] /ˈmaɪ kroʊˌmi tər/
noun
1.
micron (def 1).
Origin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for micrometer
  • The second is the measurement of the weathering of marble and other gravestones, which requires a micrometer.
  • In principle, such tests could effectively rule out theories of micrometer-size extra dimensions, he says.
  • The one on the left is one-tenth of a micrometer thick and is made of a porous support with a thin coating of the membrane.
  • Existing methods to make gratings with lines that are less than a micrometer apart are complicated and expensive.
  • They start by etching grooves into the substrate, leaving a series of thin sapphire ridges, each about one micrometer wide.
  • Etched optical bar codes into micrometer-size pieces of silicon.
  • They take a photograph of the scene, then move certain figures a micrometer, then take another picture.
British Dictionary definitions for micrometer

micrometer

/maɪˈkrɒmɪtə/
noun
1.
any of various instruments or devices for the accurate measurement of distances or angles
2.
Also called micrometer gauge, micrometer calliper. a type of gauge for the accurate measurement of small distances, thicknesses, diameters, etc. The gap between its measuring faces is adjusted by a fine screw, the rotation of the screw giving a sensitive measure of the distance moved by the face
Derived Forms
micrometry, noun
micrometric (ˌmaɪkrəʊˈmɛtrɪk), micrometrical, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for micrometer
n.

1660s, from micro- + -meter. Originally a telescope attachment; from 1884 as a craftsman's fine measuring tool. Related: Micrometry; micrometric.

Online Etymology Dictionary, © 2010 Douglas Harper
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micrometer in Medicine

micrometer mi·crom·e·ter1 (mī-krŏm'ĭ-tər)
n.
A device for measuring very small distances, objects, or angles, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.

micrometer mi·cro·me·ter2 (mī'krō-mē'tər)
n.

Abbr. μm A unit of length equal to one thousandth (10-3) of a millimeter or one millionth (10-6) of a meter. Also called micron.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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micrometer in Science
micrometer 1
  (mī-krŏm'ĭ-tər)   
A device for measuring very small distances, angles, or objects, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.
micrometer 2
  (mī'krō-mē'tər)   
A unit of length in the metric system equal to one millionth (10-6) of a meter. Also called micron.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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