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Webster 1913 Edition
Microorganism
Miˊcro-or′gan-ism
,Noun.
[
Micro-
+ organism
.] (Biol.)
Any microscopic form of life; a form of life too small to be seen by the naked eye; – particularly applied to bacteria, protozoa, yeasts, and similar organisms, esp. such are supposed to cause infectious diseases.
Definition 2024
microorganism
microorganism
See also: microörganism and micro-organism
English
Alternative forms
Noun
microorganism (plural microorganisms)
- (microbiology) An organism that is too small to be seen by the unaided eye, especially a single-celled organism, such as a bacterium.
- The cud is then reswallowed and further digested by specialized microorganisms that live in the rumen.
Related terms
Translations
an organism too small to be seen by unaided eye
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