Phenyl

n. radical derived from benzene

In chemistry, the phenyl group or phenyl ring (often abbreviated as -Ph) is the functional group with the formula-C6H5 where the six carbon atoms are arranged in a cyclic ring structure. It is in the Aryl group. It is highly stable, and is also a member of the aromatic family of compounds. This hydrophobic and aromatic hydrocarbon unit can be found in many organic compounds. It can be thought of as being derived from benzene (C6H6). In fact, in chemical literature benzene itself is sometimes denoted as Ph. One of the simplest phenyl containing compounds is phenol, C6H5OH. The resonance stability of phenol makes it a stronger acid than that of another alcohol (pKa = 10 vs. 16-18).
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Phenyl /phen·yl/ the monovalent radical C6H5sbond, derived from benzene by removal of a hydrogen.phenyl´ic phen·yl n. [more]Phenyl - Community and Resources

n. Ph, phenyl; group of chemical compounds derived from benzene (Chemistry)

(n.)
A hydrocarbon radical (C6H5) regarded as the essential residue of benzene, and the basis of an immense number of aromatic derivatives.