microorganism

[mahy-kroh-awr-guh-niz-uh m]
See more synonyms for microorganism on Thesaurus.com

Origin of microorganism

First recorded in 1875–80; micro- + organism
Related formsmi·cro·or·gan·ic [mahy-kroh-awr-gan-ik] /ˌmaɪ kroʊ ɔrˈgæn ɪk/, mi·cro·or·gan·is·mal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for microorganism

microbe, virus, parasite, bacterium, pathogen, plague, bug, disease

Examples from the Web for microorganism

Historical Examples of microorganism


British Dictionary definitions for microorganism

microorganism

noun
  1. any organism, such as a bacterium, protozoan, or virus, of microscopic size
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

microorganism in Medicine

microorganism

[mī′krō-ôrgə-nĭz′əm]
n.
  1. 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.

microorganism in Science

microorganism

[mī′krō-ôrgə-nĭz′əm]
  1. An organism that can be seen only with the aid of a microscope and that typically consists of only a single cell. Microorganisms include bacteria, protozoans, and certain algae and fungi. See Note at germ.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.