residue

noun

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. A molecule that is released from a polymer after bonds between neighbouring monomers are broken, such as an amino acid in a polypeptide chain.
4. 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.
5. 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.
6. A form of complex number, proportional to the contour integral of a meromorphic function along a path enclosing one of its singularities.