- 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.
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. 2018
Examples from the Web for mikron
Pg 78Greek text Eita mikron mikr, kinoumenon kinoumen periplaken ouk euthys apopalletai.
- a unit of length equal to 10 –6 metre. It is being replaced by the micrometre, the equivalent SI unit
C19: New Latin, from Greek mikros small
Word Origin and History for mikron
"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
- Variant ofmicron
- See micrometer2.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.