Glossary of Medical Terms

Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine


Viruses are obligate intracellular parasites of living but noncellular character, consisting of DNA or RNA and a protein coat. They range in diameter from 20-300nm. Class I viruses (Baltimore classification) have double stranded DNA as their genome. Class II have a single stranded DNA genome. Class III have a double stranded RNA genome. Class IV have a positive single stranded RNA genome, the genome itself acting as mRNA. Class V have a negative single stranded RNA genome used as a template for mRNA synthesis. Class VI have a positive single stranded RNA genome but with a DNA intermediate not only in replication but also in mRNA synthesis. The majority of viruses are recognised by the illness they reason in plants, animals and prokaryotes. Viruses of prokaryotes are known as bacteriophages.
Hales, Stephen   halethazole   half   half-a-gram stain   half amplitude pulse duration   half and half nail   half-axial projection   half axial view   (0)
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