Source : Webster's Revised Unabridged Dictionary (1913)

Residue \Res"i*due\ (r?z"?-d?), n. [F. r['e]sidu, L. residuum,
   fr. residuus that is left behind, remaining, fr. residere to
   remain behind. See {Reside}, and cf. {Residuum}.]
   1. That which remains after a part is taken, separated,
      removed, or designated; remnant; remainder.

            The residue of them will I deliver to the sword.
                                                  --Jer. xv. 9.

            If church power had then prevailed over its victims,
            not a residue of English liberty would have been
            saved.                                --I. Taylor.

   2. (Law) 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. (Chem.) 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.

Source : WordNet®

residue
     n 1: matter that remains after something has been removed
     2: something left after other parts have been taken away;
        "there was no remainder"; "he threw away the rest"; "he
        took what he wanted and I got the balance" [syn: {remainder},
         {balance}, {residual}, {residuum}, {rest}]