Here you will find one or more explanations in English for the word microorganism. Also in the bottom left of the page several parts of wikipedia pages related to the word microorganism and, of course, microorganism synonyms and on the right images related to the word microorganism.
Microorganism
Microorganism Mi`cro*["o]r"gan*ism, n. [Micro- + organism.]
(Biol.)
Any microscopic form of life; -- particularly applied to
bacteria and similar organisms, esp. such are supposed to
cause infectious diseases.