Sau·vi·gnon Blanc 
(sō-vē-nyôɴ bläɴ)
(sō-vē-nyôɴ bläɴ)n.
1. A variety of grape originally grown in France and now widely cultivated in many other wine-producing regions.
2. A light white wine made from this grape. In both senses also called Fumé Blanc.
[French : from or akin to obsolete dialectal French servagnin, sarvinien, regional names for types of grape + blanc, white.]