Source : Webster's Revised Unabridged Dictionary (1913)

Muscat \Mus"cat\, n. [F. See {Muscadel}.] (Bot.)
   A name given to several varieties of Old World grapes,
   differing in color, size, etc., but all having a somewhat
   musky flavor. The muscat of Alexandria is a large oval grape
   of a pale amber color. [Written also {muskat}.]

Source : WordNet®

muscat
     n 1: any of several cultivated grapevines that produce sweet
          white grapes [syn: {muskat}]
     2: a port on the Gulf of Oman and capital of the sultanate of
        Oman [syn: {Masqat}, {capital of Oman}]
     3: wine from muscat grapes [syn: {muscatel}, {muscadel}, {muscadelle}]
     4: sweet aromatic grape used for raisins and wine [syn: {muscatel},
         {muscat grape}]