Luscious, a.
Etymology: [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.
Shades of meaning
Fernald has no entry of its own for luscious; he lists it under delicious.
Where he writes about it:
That is delicious which affords a gratification at once vivid and delicate to the senses, especially to those of taste and smell; as, delicious fruit; a delicious odor; luscious has a kindred but more fulsome meaning, inclining toward a cloying excess of sweetness or richness. — from delicious