A kilij is a type of one-handed, single-edged and curved scimitar used by the Seljuk Empire, Timurid Empire, Mamluk Empire, Ottoman Empire, and other Turkic khanates of Eurasian steppes and Turkestan. These blades developed from earlier Turko-Mongol sabers that were in use in lands controlled or influenced by the Turkic peoples.
Various kilij from the Hellenic War Museum (Athens, Greece)
Ottoman kilij 19th century; this type with a short, broad blade is known as a "pala"; 27 in (69 cm) blade, 33 in (84 cm) total.
The upper sword appears to be an exaggerated parade piece or executioner's sword, the second down is typical of a later kilij, the third has the characteristics of an earlier kilij and the lowest one possibly has a later European-style blade. Imperial Armoury, Topkapi, Istanbul
Vienna, Treasury of the German Order. Ottoman sabres (17th century)
A scimitar is a single-edged sword with a convex curved blade associated with Middle Eastern, South Asian, or North African cultures. A European term, scimitar does not refer to one specific sword type, but an assortment of different Eastern curved swords inspired by types introduced to the Middle East by Central Asian ghilmans. These swords include the Persian shamshir, the Arab saif, the Indian talwar, the North African nimcha, and the Turkish kilij. All such swords are originally derived from earlier curved swords developed in Turkic Central Asia (Turkestan).
Arabs with scimitars from Boulanger's painting A Tale of 1001 Nights