The Collaborative International Dictionary of English v.0.48:

Ambrosial \Am*bro"sial\ ([a^]m*br[=o]"zhal or
   [a^]m*br[=o]"zh>icr/*al), a. [L. ambrosius, Gr. 'ambro`sios.]
   1. Consisting of, or partaking of the nature of, ambrosia;
      delighting the taste or smell; delicious. "Ambrosial
      food." "Ambrosial fragrance." --Milton.
      [1913 Webster]

   2. Divinely excellent or beautiful. "Shakes his ambrosial
      curls." --Pope.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ambrosial
    adj 1: extremely pleasing to the taste; sweet and fragrant; "a
           nectarous drink"; "ambrosial food" [syn: ambrosial,
           ambrosian, nectarous]
    2: worthy of the gods [syn: ambrosial, ambrosian]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "ambrosial":
   adorable, agreeable, aromatic, balmy, bittersweet, candied, dainty,
   darling, delectable, delicate, delicious, delightful, essenced,
   exquisite, flowery, fragrant, fruity, good, good to eat,
   good-tasting, gustable, gusty, heavenly, honeyed, honeysweet,
   incense-breathing, juicy, likable, luscious, lush, melliferous,
   mellifluent, mellifluous, musky, nectareous, nectarous, nice,
   odorate, odoriferous, odorous, of gourmet quality, palatable,
   perfumed, perfumy, pleasing, redolent, sacchariferous, sapid,
   savorous, savory, scented, scrumptious, sour-sweet, spicy,
   succulent, sugarcoated, sugared, sugarsweet, sugary, sweet,
   sweet and pungent, sweet and sour, sweet as sugar, sweet-scented,
   sweet-smelling, sweetened, sweetish, syrupy, tasty, thuriferous,
   toothsome, yummy