yat·a·ghan also yat·a·gan 
(yătə-găn′, -gən) or at·a·ghan (ăt-)
(yătə-găn′, -gən) or at·a·ghan (ăt-)n.
A Turkish sword or scimitar having a double-curved blade and an eared pommel, but lacking a handle guard.
[Ottoman Turkish yataǧan, curved, yataghan, from yatmaq, to lie flat, incline, slant (modern Turkish yatmak), from Old Turkic yatmaq, to lie down.]