Microorganisms, Biochemistry and Nomenclature

Abiotic Factor A physical feature of the environment that interacts with organisms. 

ABO Biood Group System One of the blood typing systems that is based on the presence or absence of blood group antigens A and B on red blood cells. 

Abortive Infection Viral infection in which viruses enter a cell but are unable to express all of their genes to make infectious progeny. 

Abscess An accumulation of pus in a cavity hollowed out by tissue damage. 

Absorption Process in which light rays are neither passed through nor reflected off an object but are retained and either transformed to another form of energy or used in biological processes. 

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