Definitions for "Microorganism"
A microorganism, or microbe, is any organism too small to be seen by the naked eye. Bacteria, viruses, protozoa, and some fungi and algae are microorganisms.
A living entity which is visible only with the aid of a microscope.
a living organism too small to be seen with the naked eye. Bacteria, protozoans, viruses, microscopic algae and some types of fungi are all microorganisms.
A living, breathing creature in your pool. The purpose of disinfectants are to remove such "infectants".
An extremely small, living breathing creature. The purpose of disinfectants, sanitisers or oxidisers is to destroy these creatures in the pool water.
Keywords:  germ, infecting
Infecting germ
Keywords:  life, small, form
a small life form