Source : Webster's Revised Unabridged Dictionary (1913)

Luscious \Lus"cious\, a. [Prob. for lustious, fr. lusty, or
   perh. a corruption of luxurious. Cf. {Lush}, {Lusty}.]
   1. Sweet; delicious; very grateful to the taste; toothsome;
      excessively sweet or rich.

            And raisins keep their luscious, native taste.
                                                  --Dryden.

   2. Cloying; fulsome.

            He had a tedious, luscious way of talking.
                                                  --Jeffrey.

   3. Gratifying a depraved sense; obscene. [R.] --Steele. --
      {Lus"cious*ly}, adv. -- {Lus"cious*ness}, n.

Source : WordNet®

lusciousness
     n : extreme appetizingness [syn: {delectability}, {deliciousness},
          {toothsomeness}]