Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
Any microscopic form of life; -- particularly applied to bacteria and similar organisms, esp. such are supposed to cause infectious diseases.
a living thing that on its own is too small to be seen without a microscope
A microscopic organism, especially a bacterium, virus, or fungus.
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
