microorganism

microorganism /mi·cro·or·gan·ism/ (-or´gah-nizm) a microscopic organism; those of medical interest include bacteria, fungi, and protozoa. Viruses are often included, but are sometimes excluded because they are not cellular and are unable to replicate without a host cell.

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mi·cro·or·gan·ism (mkr-ôrg-nzm)

n.

An organism of microscopic or submicroscopic size, especially a bacterium or protozoan.

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Microorganism

An organism (life form) that is too small to be seen with the naked eye.

Mentioned in: Antibiotics, Antituberculosis Drugs, Erythromycins, Fluoroquinolones, Penicillins, Tetracyclines, Vaginal Pain

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microorganism

[-ôr′gəniz′əm]

Etymology: Gk, mikros + organon, instrument

any tiny, usually microscopic entity capable of carrying on living processes. It may be pathogenic. Kinds of microorganisms include bacteria, fungi, protozoa, and viruses.

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microorganism [mi″kro-or´gah-nizm]

a microscopic organism; those of medical interest include bacteria, fungi, and protozoa. Viruses are often classified as microorganisms, although they are sometimes excluded because they are not cellular and they are unable to replicate without a host cell.

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microorganism

(mī´krō ōr´gnizm),
n a microscopic living organism, such as a bacterium, virus, rickettsia, yeast, or fungus. These may exist as part of the normal flora of the oral cavity without producing disease. With disturbance of the more or less balanced interrelationship among the organisms or between the organisms and host resistance, individual forms may overgrow and induce disease in the host's tissues. Those foreign to the individual may invade and produce pathologic processes.

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microorganism

a microscopic organism; those of veterinary interest include bacteria, rickettsiae, viruses, fungi and protozoa.

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microorganism

 A organism detected by microscopy–eg, viruses, bacteria, fungi and intracellular parasites–protozoans; bug