Residual sugar is the sugar that has not been fermented by the yeasts during the alcoholic fermentation and is left in the wine. Sweet (dessert) wine is an example of a wine with a lot of residual sugar.
Residual sugar is the sugar that has not been fermented by the yeasts during the alcoholic fermentation and is left in the wine. Sweet (dessert) wine is an example of a wine with a lot of residual sugar.