An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoa, algae, and fungi. Although viruses are not considered living organisms, they are sometimes classified [..]

Extremely small organism that can only be seen using a microscope.

The term for an organism that is alive but is microscopic in size

Life form that is not visible to the naked eye such as bacteria, fungi, parasites, and viruses

very tiny living thing.

An organism of microscopic size, such as a bacterium, virus, fungus, viroid, or mycoplasma. Micronutrient

an organism requiring magnification for observation

a tiny organism such as a virus, protozoan, or bacterium that can only be seen under a microscope.

Organisms (animals or plants) that are too small to be seen with the naked eye.

An organism of microscopic size, such as a bacterium, virus, fungus, viroid, or mycoplasma.

microorganism (pop)

commensal

An organism that is visible only under a microscope, such as protozoa, bacteria, fungi and viruses.

A small life form, seen only through a microscope, that may cause disease. Examples: bacteria, fungi, parasites, or viruses.

A microorganism is a very small living organism that can only be seen under a microscope and includes bacteria, viruses and some fungi.

(n) any organism of microscopic size

A microscopic plant or animal.

; an organism of microscopic or ultramicroscopic size. Molecules

an organism of microscopic size, such as bacterium

A microscopic organism

organisms (microbes) observable only through a microscope; larger, visible types are called macroorganisms.

An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoans, and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.

A bacterium, virus, or other organism that is too small to see without a microscope.

An organism that can be seen only through a microscope. Microorganisms include bacteria, protozoa, algae, and fungi. Although viruses are not considered living organisms, they are sometimes classified as microorganisms.

Living organisms or living things (plants or animals) so small in size that they are only visible by the aid of a microscope.

A microbe - A microscopic plant or animal, such as a bacterium, protozoan, yeast, virus, or algae. [4]

Living organisms or living things (plants or animals) so small in size that they are only visible by the aid of a microscope

a microbe; a living thing too small to be seen without a microscope

Living organisms that are microscopic or submicroscopic: they cannot be seen with the human eye. They include bacteria, some fungi, and protozoa. Viruses are sometimes included in this category, altho [..]

Living organisms that are microscopic or submicroscopic: they cannot be seen with the human eye. They include bacteria, some fungi, and protozoa. Viruses are sometimes included in this category, although some scientists do not include viruses as microorganisms because they do not think that viruses should be classified as living organisms. Multiple [..]

A general term for simple, one-celled organisms like bacteria.

Also called microbe, an organism of microscopic size.

Small living creatures that you need a microscope to see, i.e. bacteria, protozoa and algae

See microbe

A small life form, seen only through a microscope that may cause disease. Examples: bacteria, fungi, parasites, or viruses.

A minute living organism, such as bacteria or viruses, that can only be seen under a microscope.

A microscopic living organism, which may be single celled or multicellular. Microorganisms are very diverse and include all bacteria.

[mahy-kroh-awr-guh-niz-uh m] An organism that is so small it can only be seen through a high-powered microscope.

A living organism which is too small to be seen with the naked eye and can only be observed using a microscope. Includes bacteria and most protists.

Organism requiring magnification for observation.

These are microscopic plants and animals. They exist in soil for the purpose of breaking down organic matter into basic mineral elements. (See mineralization) They include bacteria, fungi, actinomycetes, algae, protozoa, yeast, germs, ground pearls, and nematodes.

Organism too small to be visible to the naked eye. Bacteria, viruses, protozoa, and some fungi and algae are microorganisms.

An organism of microscopic or ultramicroscopic size Pathogen Ñ a specific causative agent (as a bacterium or virus) of disease.

Extremely small organism that can only be seen using a microscope.

Minute living body not visible to the naked eye (bacteria or protozoa).

Microorganisms, also called microbes, are organic structures that are extremely small. Thus, humans can generally only see them with the aid of a microscope. Microorganisms are usually single-celled, [..]

an organism visible only through a microscope.

(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 spec [..]

A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or a colony of cells. The possible existence of unseen microbial life was suspected from ancient times [..]