noun that which remains after a part is taken, separated, removed, or designated; remnant; remainder.
2. residue ·noun that part of a testeator's estate wwhich is not disposed of in his will by particular and special legacies and devises, and which remains after payment of debts and legacies.
3. residue ·noun any positive or negative number that differs from a given number by a multiple of a given modulus; thus, if 7 is the modulus, and 9 the given number, the numbers -5, 2, 16, 23, ·etc., are residues.
4. residue ·noun that which remains of a molecule after the removal of a portion of its constituents; hence, an atom or group regarded as a portion of a molecule;
used as nearly equivalent to radical, but in a more general sense.