For the medieval sabre that is also referred to as a "cimeter", see Scimitar.
A cimeter or scimitar is a large, curved butcher's knife, with a blade typically 8-14" (20-35 cm) long. It is used primarily for cutting large pieces of meat into retail cuts such as steaks.
These knives are available with and without Granton edge. According to Webstaurant Store, a major supplier to the food industry, "Granton edge knives feature hollowed out sections running along both sides of the blade. When slicing meat, the grooves fill with fat and juices, which permits more contact between the meat and blade. Granton edge knives are often preferred when slicing thin portions of poultry, roasts, or ham."
Chef Alton Brown says that a cimeter is one of only five knives he keeps in his kitchen.