integro-differentialadj.

1914 Trans. Amer. Math. Soc. 15 215 A large part of the theory of integral and integro-differential equations may be reduced to the corresponding theory of algebraic and differential equations by the introduction of convenient symbolism.

1923 Bull. Amer. Math. Soc. 29 210 Integro-differential invariants of one-parameter groups of Fredholm transformations.

1930 M. Long tr. V. Volterra Theory of Functionals 31 As it has the characters of both integral and differential equations, it will be called an integro-differential equation.

1958 E. M. Grabbe et al. Handbk. Automation, Computation, & Control I. ix. 18 The method..is applicable to ‘integro-differential equations’ such as the following: a₀dx/dt + a₁x + a₂∫^t/ ₀xdt = f(t).

1964 N. N. Hancock Matrix Anal. Electr. Machinery v. 70 The fundamental equations of an electro-dynamic system are inherently integro-differential equations.