1911 Encyclopædia Britannica/Yataghan

YATAGHAN (from Turk, yātāghān; sometimes spelled in English "attaghan" and "ataghan"), the name of a type of sword common to Mahommedan peoples. It has no guard or quillons, but a large and often decorated pommel; its blade has a double curve on the cutting edge, first concave and then convex; the back is usually straight (see Sword).