residue

noun

• Whatever remains after something else has been removed.
• The substance that remains after evaporation, distillation, filtration or any similar process.
• A molecule that is released from a polymer after bonds between neighbouring monomers are broken, such as an amino acid in a polypeptide chain.
• 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.
• A form of complex number, proportional to the contour integral of a meromorphic function along a path enclosing one of its singularities.