Glossary O

Glossary

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• Oligosaccharides
• Original Gravity

The density of the wort prior to fermentation, expressed as a ratio as compared to the density of water. A measure of the amount of solids in the wort.

• Octoberfest

A bottom-fermented Vienna- or marzen-style beer, originally brewed for Germany's Oktoberfest celebration. Copper-colored, malty, and sweet.

• Oxidation

When a packaged beer is stored for a period of time, it stales, or oxidizes. Different beers stale at different rates and develop off flavors. The rate of oxidation goes up as the temperature goes up. Oxidation is familiar to drinkers as a papery or cardboard like character in both taste and aroma.