Oxidation
/ok-sih-DAY-shun/Chemical reaction with oxygen, aging or spoiling wine.
Full Definition
Oxidation is the chemical reaction between wine and oxygen. Controlled oxidation is essential for aging, softening tannins and developing complexity. Excessive oxidation causes spoilage: browning color, flat aromas, sherry-like character, and loss of fruit. Intentional oxidative aging occurs in Sherry, Madeira, and some Jura wines.