Adjective
of or relating to or characterized by configuration
Source: WordNetMore definitions * A configurational stereoisomer is a stereoisomer of a reference molecule that has the opposite configuration at a stereocenter (e. Source: Internet
This means that configurational isomers can be interconverted only by breaking covalent bonds to the stereocenter, for example, by inverting the configurations of some or all of the stereocenters in a compound. Source: Internet