The Collaborative International Dictionary of English v.0.48:

Muscadel \Mus"ca*del`\, muscadelle \mus"ca*delle\, n. [It.
   moscadello, moscatello, LL. muscatellum or muscadellum (sc.
   vinum), fr. muscatellus nutmeglike, dim. of muscatus smelling
   like musk, muscatum and muscata (sc. nux) nutmeg: cf. F.
   muscadelle, fr. Italian. See Musk and cf. Moschatel,
   Muscardin, Muscat, Nutmeg.]
   See Muscatel, n.
   [1913 Webster]

         Quaffed off the muscadel.                --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

muscadelle
    n 1: wine from muscat grapes [syn: muscat, muscatel,
         muscadel, muscadelle]