extremely small.
minute in scope or capability.
of or pertaining to microcomputers.
of or pertaining to microeconomics.
noun, plural micros.
anything extremely small in scope or capability.
a microcomputer.

independent use of micro-, or shortening of words with this initial element

Dictionary.com Unabridged


a combining form with the meanings “small” (microcosm; microgamete ), “very small in comparison with others of its kind” (microcassette; microlith ), “too small to be seen by the unaided eye” (microfossil; microorganism ), “dealing with extremely minute organisms, organic structures, or quantities of a substance” (microdissection; microscope ), “localized, restricted in scope or area” (microburst; microhabitat ), “(of a discipline) focusing on a restricted area” (microeconomics ), “containing or dealing with texts that require enlargement to be read” (microfilm; microreader ), “one millionth” (microgram ).
Also, especially before a vowel, micr-.

< Greek: combining form representing mīkrós small

macro-, micro-.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To micro
World English Dictionary
micro (ˈmaɪkrəʊ)
1.  very small
n , -cros
2.  microcomputer microlepidoptera microprocessor short for microwave oven

micro- or micr-
combining form
1.  small or minute: microspore
2.  involving the use of a microscope: micrography
3.  indicating a method or instrument for dealing with small quantities: micrometer
4.  Compare macro- (in pathology) indicating abnormal smallness or underdevelopment: microcephaly; microcyte
5.  μ denoting 10--6: microsecond
[from Greek mikros small]
micr- or micr-
combining form
[from Greek mikros small]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

comb. form of Gk. mikros "small" (see mica).
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

micro- or micr-

  1. Small: microblast.

  2. Abnormally small: microcephaly.

  3. Requiring or involving microscopy: microsurgery.

  4. Symbol μ One-millionth (10-6): microliter.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
A prefix that means: "small" (as in microorganism) or "one millionth" (as in microsecond).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Computing Dictionary

micro definition


The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
Cite This Source
Example sentences
Instead the hottest economic-model-making now began on micro foundations.
The more consistent macro is with micro, the more solid it will be, even if the
  micro variables are arbitrary.
Everybody's talking about micro fuel cells and their potential, but there are
  no actual products.
And as long as they ignore the facts of micro economics, they will prescribe
  the wrong solutions.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature