residue

noun6

1. •
   That which persists or remains following the removal or elimination of other elements.
2. •
   The substance that remains after evaporation, distillation, filtration or any similar process.
3. •
   Whatever property or effects are left in an estate after payment of all debts, other charges and deduction of what is specifically bequeathed by the testator.
4. •
   A representative element of an equivalence class modulo some base, conventionally in the half-open interval from zero to the base; the nonnegative remainder after dividing a number by a base.
5. •
   A molecule that is released from a polymer after bonds between neighbouring monomers are broken, such as an amino acid in a polypeptide chain.
6. •
   A form of complex number, proportional to the contour integral of a meromorphic function along a path enclosing one of its singularities.

   • By taking residues, we can represent this integral in terms of a Jackson integral. — 2001