microorganism
noun
mi·cro·or·gan·ism
| \ ˌmī-krō-ˈȯr-gə-ˌni-zəm
\
\
Definition of microorganism
: an organism (such as a bacterium or protozoan) of microscopic or ultramicroscopic size
Examples of microorganism in a Sentence
Recent Examples on the Web
Moreover, the Beresheet mission was hardly the first time anyone delivered microorganisms to the Moon. — Robert Zubrin, National Review, "‘Tardigrades on the Moon Is Not Good’," 31 Aug. 2019 Panspermia is the hypothesis that life on Earth originated from microorganisms in outer space that were carried here unintentionally by objects such as space dust, meteoroids and asteroids, according to an article on NASA's website. — Fox News, "Meteorite strikes made life on Earth possible, study says," 14 Aug. 2019 When patients who have been treated for highly infectious illnesses are discharged, the human housekeepers are followed by a cleaning robot that zaps germs and microorganisms with an ultraviolet light. — CBS News, "Hospitals mobilize to fight deadly superbug doctors call a "double whammy"," 30 July 2019 Amstislavski moved into a teaching job at UAA in 2014 and began testing out microorganisms in a lab. — Devin Kelly, Anchorage Daily News, "Using fungi, UAA team develops biodegradable insulation for shipping Alaska seafood," 14 July 2019 Probiotics are live, good microorganisms found in some foods and supplements that can contribute to a healthy gut microbiome. — Texas A&m University, Houston Chronicle, "Pet Talk: The benefits of a balanced microbiome," 13 July 2019 When a jellyfish swims, its contractions force water under its bell, and that water carries microorganisms. — Matt Simon, WIRED, "This Jellyfish Robot Is Much More Than Just a Good Swimmer," 2 July 2019 Weeping wounds of this nature tend to be due to winter injury followed by colonization of various microorganisms or Phytophthora canker. — oregonlive.com, "Tips for success when planting under conifer and maple trees? Ask an expert," 8 June 2019 Five percent of 900 tick species are known to transmit disease-causing microorganisms. — Joyce Sakamoto, Washington Post, "Ticks and mosquitoes are ready to deliver disease in a bite, but you can stop them," 18 June 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microorganism.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for microorganism
microorganism
noun
English Language Learners Definition of microorganism
biology
: an extremely small living thing that can only be seen with a microscope
See the full definition for microorganism in the English Language Learners Dictionary
microorganism
noun
mi·cro·or·gan·ism
| \ ˌmī-krō-ˈȯr-gə-ˌni-zəm
\
\
Kids Definition of microorganism
: a living thing (as a bacterium) that can only be seen with a microscope
microorganism
noun
mi·cro·or·gan·ism
| \ -ˈȯr-gə-ˌniz-əm
\
\
Medical Definition of microorganism
: an organism of microscopic or ultramicroscopic size
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