What term describes a dessert wine made from grapes affected by botrytis?

The term that describes a dessert wine made from grapes affected by botrytis is "Sélection de Grains Nobles." This French term specifically refers to wines produced from grapes that have been selectively harvested to include those affected by noble rot, or botrytis cinerea. The presence of this fungus causes the grapes to shrivel, concentrating their sugars and flavors, which results in a richly flavored dessert wine with complex aromas and a luxurious sweetness.

While "Late Harvest" refers to wines made from grapes that are harvested later in the season to achieve higher sugar levels, it does not necessarily mean they are affected by botrytis. "Passito" is an Italian term for wines made from partially dried grapes, which may include botrytis-affected grapes but is not solely defined by it. Lastly, "Sec" refers to dry wines, which is not relevant in the context of sweet dessert wines significantly impacted by botrytis. Hence, "Sélection de Grains Nobles" is the most accurate term for this type of dessert wine.