Jacobian /jɑːˈkəʊ.bi.ən/noun 2adjective 2forms 4 noun2 •A Jacobian matrix or its associated operator. •The determinant of such a matrix. adjective2 •Used to specify certain mathematical objects named in honour of C. G. J. Jacobi.The Jacobian matrix has partial derivatives as its entries. •Of or relating to the biblical Jacob. formsJacobians · jacobians · more Jacobian · most Jacobian