Glossary
Reduction
/ree-DUK-shun/
Sulfur compounds from lack of oxygen, creating off-odors.
Full Definition
Reduction is the opposite of oxidation - chemical reactions in oxygen-absent conditions producing sulfur compounds. Mild reduction smells of struck match or rubber; severe reduction of rotten eggs or sewage. It can occur from screwcap closure, minimal oxygen winemaking, or sulfur residues. Often blows off with aeration.
Related Terms
See Also
Reference
More terms starting with R
Racking
Transferring wine off its sediment.
Racy
Wine with vibrant, energetic acidity.
Remuage
Gradually rotating sparkling wine bottles to collect sediment.
Reserve
A designation suggesting higher quality or longer aging.
Residual Sugar
Sugar remaining in wine after fermentation.
Resveratrol
Antioxidant compound found in grape skins.