Siphoviridae

Siphoviridae are a family of double-stranded DNA viruses infecting only bacteria. These viruses may also be referred to as bacteriophages. The characteristic structural features of this family are a nonenveloped head and noncontractile tail. ==Virology== Virions of viruses in this family have an icosahedral capsid (morphotype B1) or a prolate caps...
Found on http://en.wikipedia.org/wiki/Siphoviridae

siphoviridae

A family of bacteriophages which are characterised by long, non-contractile tails. ... (12 Dec 1998) ...
Found on http://www.encyclo.co.uk/local/20973

Siphoviridae

Type: Term Pronunciation: sī′fō-vir′i-dē Definitions: 1. A family of bacterial viruses with long, noncontractile tails and isometric or elongated heads, containing double-stranded DNA (MW 25-79 ׀ 106); includes the λ temperate phage group and probably other genera.
Found on http://www.medilexicon.com/medicaldictionary.php?t=82365
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