An instrument for measuring a refractive index, which is related to the amount by which the angle of a light wave is changed when passing through the boundary between two media. The amount of refraction is a convenient way to measure solute concentration of a solution and is widely used in viticultural and winemaking to follow the ripeness of grapes and changes during vinification.
Very large group of highly reactive chemical compounds of which phenol is the basic building block. These include many natural colour pigments such as the anthocyanins of fruit and dark-skinned grapes, most natural vegetable tannins such as occur in grapes, and many flavour compounds.
French word for various systems of pumping over. In winemaking terms it is the pumping of the liquid in the fermentation tank over the cap of skins and solids during the red wine fermentation.
Widely misused term meaning strictly the climate within a defined and usually very restricted space or position. In viticulture, it might be at specific positions between rows of vines, or distances above the ground.
Bouillie bordelaise in French, once much-used mixture of lime, copper sulfate, and water first recorded in 1885 by Alexis Millardet, as an effect control of downy mildew.
Term in common parlance, but not in federal law, in the US that suggests loosely that the wine came entirely from grapes farmed on the winery's own property.
The greatest wine of Sauternes and, according to the famous 1855 classification, of the entire Bordeaux region it is sweet, golden, and apparently almost immortal.
Is by German law a rosé wine at least 95% of which is made by direct pressing of a single red wine grape variety named on the label (Spätburgunder and Portugieser are especially common).
Affects vines when air temperatures are high. Very high daytime temperatures, of more than 40°C/104°F, cause the vine to "shut down", or virtually cease photosynthesis, as the enzymes responsible can no longer work. High temperatures also lead to water stress, especially when accompained by bright sunshine, low humidity, and strong, dry winds.
Important village in the Côte de Nuits district of Burgundy producing red wines from Pinot Noir grapes. Morey suffers, perhaps unfairly, in comparison with ist neighbours Chambolle-Musigny and Gevrey-Chambertin beacuse its wines are usually described as being lighter versions of Gevrey or firmer than Chambolle, according to which side of the village they are located.
An element that is extremely important in wine production. The addition of sulfur dioxide during crushing and pressing deactivates enzymes that catalyse oxidation, which leads to juice browning and modification of aromas and flavours, which is why it is often added to freshly picked grapes in the salt form of metabisulfite. (The compound is widely, often more liberally, used in the preparation of other foods and drinks, particularly in fruit juices and dried fruits).
French term meaning "bled" for a winemaking technique which results in a rosé wine made by running off, or "bleeding", a certain amount of free-run juice from just-crushed dark-skinned grapes after a short, prefermentation maceration.
In the dialect of the north west Italian region of Piemonte, indicates the highest part of an elevation in the landscapeor, in particular, a vineyard with a steep gradient at the top of a hill.
The special distinction of this region embedded within the Graves distric south of Bordeaux is that it is dedicated, in a way unmatched by any other wine region, to the production of unfortified, sweet, white wine.
French for "white of whites", may justifiably be used to describe white wines made from pale-skinned grapes. As the great majority of them are. A real significance only when used for white sparkling wines.
One of the most important wine rivers, linking a range of vineyards as dissimilar as those of Châteauneuf-du Pape in southern France, sparkling Seyssel, and Fendant du Valais in Switzerland.