Or microbe; Living organism invisible to the naked eye but visible under a microscope. Microorganisms include viruses and single-celled organisms such as bacteria, protozoa, yeasts, and some algae. The term has no taxonomic significance in biology. The study of microorganisms is known as microbiology.
Any organism (animal or plant) of microscopic size. micro-organism
Mikrob, životinjsko i biljno biće koje se može videti samo pomoću mikroskopa.