stereoselectivePronunciation: /ˌstɛrɪəʊsɪˈlɛktɪv, ˌstɪə-/Definition of stereoselective adjective Chemistry (of a reaction) preferentially producing a particular stereoisomeric form of the product, irrespective of the configuration of the reactant. Derivatives stereoselectivity noun stereoselective in other Oxford dictionaries Definition of stereoselective in the US English dictionary