Ricci tensorPronunciation: /ˈriːtʃi/Definition of Ricci tensor noun Mathematics a set of components that describes part of the curvature of space-time. It is a symmetric second-order tensor. Origin: 1920s: named after Curbastro G. Ricci (1853–1925), Italian mathematicianRicci tensor in other Oxford dictionaries Definition of Ricci tensor in the US English dictionary