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microorganism

 - 5 dictionary results

mi⋅cro⋅or⋅gan⋅ism

  [mahy-kroh-awr-guh-niz-uhm]
Use microorganism in a Sentence
–noun
any organism too small to be viewed by the unaided eye, as bacteria, protozoa, and some fungi and algae.
Origin:
1875–80; micro- + organism

Related forms:
mi⋅cro⋅or⋅gan⋅ic  [mahy-kroh-awr-gan-ik] , mi⋅cro⋅or⋅gan⋅is⋅mal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To microorganism
mi·cro·or·gan·ism   (mī'krō-ôr'gə-nĭz'əm)   
n.  An organism of microscopic or submicroscopic size, especially a bacterium or protozoan.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

microorganism 
1880, coined in Eng. from micro- + organism.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: mi·cro·or·gan·ism
Pronunciation: -'or-g&-"niz-&m
Function: noun
: an organism of microscopic orultramicroscopic size
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

microorganism mi·cro·or·gan·ism (mī'krō-ôr'gə-nĭz'əm)
n.
An organism of microscopic or submicroscopic size, especially a bacterium or protozoan.

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