\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.
Note: The term radical is sometimes restricted to groups
      containing carbon, the term residue being applied to
      the others.
4. (Theory of Numbers) 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.
Syn: Rest; remainder; remnant; balance; residuum; remains;
     leavings; relics.