Wordnet 3.0
NOUN (1)
1. 
 used to make malmsey wine; 
The Collaborative International Dictionary of English v.0.48:
malvasia \malvasia\ n.
   A sweet grape used to make malmsey wine.
   [WordNet 1.5]
WordNet (r) 3.0 (2006):
malvasia
    n 1: used to make malmsey wine