Debourbage
Refers to a process in which the must of a white wine is allowed to settle before racking off the wine, this process reduces the need for filtration or fining.

Decantation
The process of pouring wine from its bottle into a decanter to separate the sediment from the wine.

Dégorgement tardive
French term for a Champagne that has been aged sur lie for an exceptionally long time (far beyond the usually 5-10 years of vintage Champagne) before going through degorgement.

Demi-sec
A medium-dry sparkling wine. In Champagne, this a wine that has received a dosage of 32-50 grams/liter

Dessert wine
Varies by region. In the UK, a very sweet, low alcohol wine. In the US by law, any wine containing over 15% alcohol.

DO
1. The abbreviation for Denominación de Origen, or “place name”. This is Spain’s designation for wines whose name, origin of grapes, grape varieties and other important factors are regulated by law.
2. The abbreviation for dissolved oxygen, the degree of oxygen saturation in a wine, which strongly affects oxidation of the wine and its ageing properties.

DOC
The abbreviation for Denominazione di Origine Controllata, or “controlled place name.” This is Italy’s designation for wine whose name, origin of grapes, grape varieties and other important factors are regulated by law. It is also the abbreviation for Portugal’s highest wine category, which has the same meaning in that country.

Doce/Dolce/Doux/Dulce
Portuguese, Italian, French and Spanish terms for a sweet wine

DOCG
The abbreviation for Denominazione di Origine Controllata e Garantita, or controlled and guaranteed place name, which is the category for the highest-ranking wine in Italy.

Drip dickey
Trademarked name for a cover that slips over the neck of a wine bottle and absorbs any drips that may run down the bottle after pouring, preventing stains to table cloths, counter tops or other surfaces. The generic term is drip cloth.

Dry
Lacking sweetness in taste.