Achaemenid
Concise Oxford English Dictionary © 2008 Oxford University Press:
Achaemenid /əˈkiːmənɪd/ (also Achaemenian /ˌakɪˈmiːnɪən/)
▶noun a member of the dynasty ruling in Persia from Cyrus I to Darius III (553–330 bc).
– origin named after Achaemenes, the reputed ancestor of the dynasty.
'Achaemenid' also found in these Oxford entries:

