1) Alkyl alternative 2) Aromatic compound 3) Chemical ending 4) Containing an aryl group 5) Hydrocarbon-derived group 
(Ar) aryl group. A molecular fragment or group attached to a molecule by an atom that is on an aromatic ring.
In the context of organic molecules, aryl refers to any functional group or substituent derived from an aromatic ring, be it phenyl, naphthyl, thienyl, indolyl, etc. (see IUPAC nomenclature). `Aryl` is used for the sake of abbreviation or generalization, and `Ar` is used as a placeholder for the aryl group in chemical structure diagrams. A sim...
An organic radical derived from an aromatic compound by removing a hydrogen atom. ... (05 Mar 2000) ... 
(ar´әl) a radical derived from an aromatic compound by removal of a hydrogen atom from the ring. The term can also be used as a prefix.
Type: Term Pronunciation: ar′il Definitions: 1. An organic radical derived from an aromatic compound by removing a hydrogen atom.
A molecular fragment or group attached to a molecule by an atom that is on an aromatic ring. See also: Aromatic Compound.
containing an aryl group.