1) Blade weapon 2) Iranian invention 
The acinaces, also spelled akinakes (Greek ἀκινάκης) or akinaka (unattested Old Persian *akīnakah) is a type of dagger or short sword used mainly in the first millennium BC in the eastern Mediterranean region, especially by the Medes, Scythians and Persians, then by the Greeks. The acinaces is of Scythian origin, but was made famous by t...
• (n.) A short sword or saber.
A·cin'a·ces noun [ Latin , from Greek ....] (Anc. Hist.) A short sword or saber. 
acinaces A short sword or saber.