noun. A minute life form; a microorganism, especially a bacterium that causes disease. Not in technical use.

noun. A minute living being not distinguished, primarily, as to its animal or vegetable nature.

noun. A microscopic organism; a microorganism; -- particularly applied to bacteria and especially to pathogenic forms.

noun. Any microorganism, but specially said of those microorganisms which are harmful types of bacteria.

noun. a minute life form (especially a disease-causing bacterium); the term is not in technical use

"[Footnote: The term microbe is simply a word which has been coined to include all of the microscopic plants commonly included under the terms bacteria and yeasts.] has developed with a marvellous rapidity."

microbion  

microorganism  

microorganism  

Cyanobacteria  algae  bacilli  bacteria  bacterium  

adenovirus  aerobe  aerobic bacteria  aerobic organism  amoeba