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micron

or mi·kron

[ mahy-kron ]
/ ˈmaɪ krɒn /
|

noun, plural mi·crons, mi·cra [mahy-kruh] /ˈmaɪ krə/.

Also called micrometer. the millionth part of a meter. Symbol: μ, mu
Physical Chemistry. a colloidal particle whose diameter is between 0.2 and 10 microns.
Physics. a very small unit of pressure, equal to that exerted by a column of mercury 1μ high.

Nearby words

micromotion, micromount, micromyelia, micromyeloblast, micromyeloblastic leukemia, micron, micronation, micronesia, micronesia, federated states of, micronesian, micronize

Origin of micron

1880–85; < Greek mīkrón a little, noun use of neuter singular of mīkrós small; see -on1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for micron

British Dictionary definitions for micron

micron

/ (ˈmaɪkrɒn) /

noun plural -crons or -cra (-krə)

a unit of length equal to 10 –6 metre. It is being replaced by the micrometre, the equivalent SI unit

Word Origin for micron

C19: New Latin, from Greek mikros small
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

Word Origin and History for micron

micron

n.

"one millionth of a meter," 1892, coined 1880 in French from Greek mikron, neuter of mikros "small" (see mica).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for micron

micron

n. pl. mi•crons

micrometer2
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for micron

micron

[ mī′krŏn′ ]

See micrometer2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.