There are many varieties of curry. The choice of spices for each dish in traditional cuisine depends on regional cultural traditions and personal preferences. Such dishes have names such as dopiaza and rogan josh that refer to their ingredients, spicing, and cooking methods. Outside the Indian subcontinent, a curry is a dish from Southeast Asia which uses coconut milk and spice pastes, and is commonly eaten over rice. Curries may contain fish, meat, poultry, or shellfish, either alone or in combination with vegetables. Others are vegetarian. A masala mixture is a combination of dried or dry-roasted spices commonly homemade for some curries.

Source: Wikipedia