Similar term(s): phenyl group, -Ph.
Functional chemical group with the formula C6H5 where
the six carbon atoms are arranged in a ring.
The phenyl group is simply a benzene ring with one hydrogen atom removed and
is always attached to something else.
Source: Prentice Hall Organic
To read about this term in context:
GreenFacts Summary on PCBs Polychlorinated biphenyls: