G
- Gelatine
- A fining agent used to remove excessive amounts of tannins and other negatively charged phenolic compounds from the wine.
- Geosmin
- A chemical compound found in wine grapes that is responsible for some earthy aromas and flavors. Geosmin is also found in beets and potatoes.
- Grape juice
- The free-run or pressed juice from grapes. Unfermented grape juice is known as "must."
Read more about this topic: Glossary Of Winemaking Terms