Offal: Edible internal organs of meat, poultry and game.
Oloroso: (Spanish) Type of sherry. Oloroso means fragrant in Spanish and this sherry has an intense bouquet.
Oporto: (Portuguese) Sweet dessert port wines named after Oporto, Portugal, on the Douro river.
Osso Buco: (Italian) Dish of braised marrow bones prepared with tomato and wine.
Oxidized: Wine that has been in contact with air too long, causing it to darken and smell stale.
Oyster Sauce: (Chinese) Seasoning made from oysters, water, salt,cornstarch, and appears as a caramel-like sauce.