The Collaborative International Dictionary of English v.0.48:

Savoy \Sa*voy"\, n. [F. chou de Savoie cabbage of Savoy.] (Bot.)
   A variety of the common cabbage (Brassica oleracea major),
   having curled leaves, -- much cultivated for winter use.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Savoy
    n 1: a geographical region of historical importance; a former
         duchy in what is now southwestern France, western
         Switzerland, and northwestern Italy
    2: head of soft crinkly leaves [syn: savoy cabbage, savoy]