What is "phenacyl"

n. (context organic chemistry especially in combination English) The aromatic ketonic radical C₆H₅-CO-CH₂-

In organic chemistry, a phenacyl group is an aromatic substituent that consists of a phenyl group attached to an acyl group. A molecule containing a phenacyl group has the formula RCH(CO)CH and the structure shown to the right. Here, R denotes the remainder of the molecule; for instance, if R is Br, then the compound could be called "phenacyl bromide". Note however that in the standard IUPAC nomenclature this compound would instead be called "2-bromo-1-phenylethanone".