microorganisms

1. Organisms so small that they can be seen only through a microscope . ( See bacteria , protozoa , and viruses .)

Example Sentences

As an adult, Jonah is drawn to study extremophiles, microorganisms that flourish in intense climates.

From The Daily Beast

“I was fascinated by the role of microorganisms in allowing life on Earth to exist,” she says.

From The Daily Beast

Ameba are microorganisms of the simplest structure—a protoplasm which is constantly changing in shape.

From Project Gutenberg

Organized ferments are living microorganisms, capable, as a result of their growth, of causing the changes.

From Project Gutenberg

The destructive effect of microorganisms both in the interior of the cheese and upon its surface is rapid.

From Project Gutenberg

When the infected egg is eaten raw the microorganisms, if present, are communicated to man and may cause disease.

From Project Gutenberg

Familiar microorganisms and a standard vegetation added to the practicality of human settlements on otherwise alien worlds.

From Project Gutenberg