2. Essential to completeness; constituent, as a part; pertaining to, or serving to form, an integer; integrant. Ceasing to do evil, and doing good, are the two great integral parts that complete this duty. (South)
3. (Science: mathematics) Of, pertaining to, or being, a whole number or undivided quantity; not fractional. Pertaining to, or proceeding by, integration; as, the integral calculus. Integral calculus. See calculus.
2. (Science: mathematics) An expression which, being differentiated, will produce a given differential. See differential differential, and integration. Cf. Fluent. Elliptic integral, one of an important class of integrals, occurring in the higher mathematics; so called because one of the integrals expresses the length of an arc of an ellipse.