seraskier
Concise Oxford English Dictionary © 2008 Oxford University Press:
seraskier /ˌsɛrəˈskɪə/
▶noun historical the commander-in-chief and minister of war of the Ottoman Empire.
– origin Turk., from Pers. sar'askar ‘head (of the) army’.
'seraskier' also found in these Oxford entries:

