The Collaborative International Dictionary of English v.0.48:

Nectarous \Nec"tar*ous\, a.
   Nectareous. --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "nectarous":
   agreeable, ambrosial, bittersweet, candied, dainty, delectable,
   delicate, delicious, delightful, exquisite, good, good to eat,
   good-tasting, gustable, gusty, honeyed, honeysweet, juicy, likable,
   luscious, lush, melliferous, mellifluent, mellifluous, nectareous,
   nice, of gourmet quality, palatable, pleasing, sacchariferous,
   sapid, savorous, savory, scrumptious, sour-sweet, succulent,
   sugarcoated, sugared, sugarsweet, sugary, sweet, sweet and pungent,
   sweet and sour, sweet as sugar, sweetened, sweetish, syrupy, tasty,
   toothsome, yummy