Definitions for: Microorganism

[n] any organism (animal or plant) of microscopic size

Webster (1913) Definition: Mi`cro*["o]r"gan*ism, n. [Micro- + organism.]
Any microscopic form of life; -- particularly applied to
bacteria and similar organisms, esp. such are supposed to
cause infectious diseases.

See Also: bacteria, bacterium, being, bug, germ, intestinal flora, microbe, moneran, moneron, organism, pathogen, pilus, protist, protistan, protoctist, virus

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