Noun
Any microscopic form of life; -- particularly applied to bacteria and similar organisms, esp. such are supposed to cause infectious diseases.
Source: Webster's dictionaryOnly if some microorganism doesn't attack these tender hothouse plants and eat away at their roots, only if they don't rot! And that can happen with pineapples! Oh, yes, indeed it can! Mikhail Bulgakov
It is hard to explain the huge variety of diatoms - a microorganism that has 100,000 species - in terms of natural selection. John Tyler Bonner
I actually found contracting malaria in the Congo fascinating. Observing your body under attack from this microorganism and seeing how it responds is simultaneously fascinating and awful but maybe that's just because I'm a former biology teacher. Jeremy Wade
A monovalent vaccine is designed to immunize against a single antigen or single microorganism. Source: Internet
Etymology The term antibiotic was first used in 1942 by Selman Waksman and his collaborators in journal articles to describe any substance produced by a microorganism that is antagonistic to the growth of other microorganisms in high dilution. Source: Internet
Even if the microorganism does get into the eye, tears contain the enzyme lysozyme, which will kill most invading microorganisms. Source: Internet