In French cuisine, galantine (French: [galɑ̃tin]) is a dish of boned stuffed meat, most commonly poultry or fish, that is usually poached and served cold, often coated with aspic. Galantines are often stuffed with forcemeat, and pressed into a cylindrical shape. Since boning poultry can be difficult and time-consuming for the novice, this is a rather elaborate dish, which is often lavishly decorated, hence its name, connoting a presentation at table that is galant, or urbane and sophisticated. In the later nineteenth century the technique’s origin was already attributed to the chef of the marquis de Brancas. Wikipedia

The terrine, as a cooking vessel, is a deep, rectangular, straight-sided dish – usually ceramic, glass or cast iron – with a tight-fitting lid. In traditional cooking, the terrine dish often would be made in the shape of an animal, usually depicting the contents of the terrine. The food is constructed in loaf-shaped layers of either meat or fish, and can sometimes actually contain vegetables which are served cold either in the terrine it was cooked in or sliced. The beauty of creating terrines are their ability to be anything from a simple, rustic affair of modest meats, through to elaborate haute-cuisine of game, foie gras, and truffles. The limitation is only in the imagination of the cook. Spruceats