What does "integral" mean?

Integral: 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.

Additional senses

  1. 2.(Math.) (a) Of, pertaining to, or being, a whole number or undivided quantity; not fractional. (b) Pertaining to, or proceeding by, integration; as, the integral calculus. Integral calculus. See under Calculus.
  2. 3.A whole; an entire thing; a whole number; an individual.
  3. 4.(Math.) 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.

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