Bacteria (common noun bacteria, singular bacterium) is a type of biological cell.
A bacteriophage, also known informally as a phage, is a virus that infects and replicates within Bacteria and Archaea.
A capsid is the protein shell of a virus.
The Caudovirales are an order of viruses also known as the tailed bacteriophages (cauda is Latin for "tail").
Escherichia coli (also known as E. coli) is a Gram-negative, facultatively anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms).
Podoviridae is a family of viruses in the order Caudovirales.
Bacteriophage T7 (or the T7 phage) is a bacteriophage, a virus that infects susceptible bacterial cells, that is composed of DNA and infects most strains of Escherichia coli.
T7likevirus (synonyms T7 phage group, T7-like phages, and T7-like viruses) is a genus of viruses in the order Caudovirales, in the family Podoviridae, in the subfamily Autographivirinae.