a. [f. prec. + -AL.] Pertaining to, or involving the use of, equations.
1852. W. Hipsley (title), Equational Arithmetic, Applied to questions of Interest, Annuities, [etc.].
1880. Athenæum, 13 Nov., 636/3. A further theoretical aid in equational logic.
Hence Equationally adv., in an equational form; by the use of equations.
1881. Jevons, in Nature, XXIII. 487. They [secondary propositions] obey exactly the same formal laws as primary propositions, and are of course expressed equationally.
