1) Bacteriophage 2) Phage 
A coliphage is a type of bacteriophage that infects Escherichia coli. Examples include Bacteriophage lambda and Leviviridae. ...
<virology> A bacteriophage (a virus which infects bacteria) that specialises in colliforms (a type of bacteria which inhabits the bowels of larger organisms). ... (09 Oct 1997) ... 
Type: Term Pronunciation: kō′li-fāj, kol′i- Definitions: 1. A bacteriophage with an affinity for one or another strain of Escherichia coli. In general, coliphages, like other bacteriophages, are known by symbols that have significance only as a means of laboratory identification; additional notations, however, specifically ide...
noun a bacteriophage that infects the bacterium Escherichia coli
any bacteriophage that specifically infects the Escherichia coli bacterium.