Definition of "phenyl" []

• The univalent organic radical C6H5, derived from benzene by removal of one hydrogen atom. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Phenylalanine (a molecule of alanine to which an atom combination called the phenyl group is added),"
• "It would be another quarter of a century before scientists finally identified Carol’s condition she was suffering from phenylketonuria, or PKU, brain degeneration caused by inability in the newborn child to process a chemical called phenyl, a deficiency that can be treated only if detected in its early stages."
• "It is often listed as mercuric oxide, phenyl mercuric acetate, benzoate, bromine, chloride or borate."