əˈkēmənə̇d, aˈ-, -kem-, -ˌnid noun
( plural achaemenids -dz ; also ach·ae·men·i·dae ˌakə̇ˈmenəˌdē ; or ach·ae·men·i·des ˌakə̇ˈmenəˌdēz)
Usage: usually capitalized
Etymology: Greek Achaimenidēs, from Achaimenēs (Achaemenes), 7th century B.C. Persian king, founder of the dynasty + Greek -idēs (patronymic suffix)
: a member of the ruling house of ancient Persia from 553 B.C. during the reign of Cyrus the Great to the overthrow of Darius III in 330 B.C.
• ach·ae·me·nid·i·an |akə̇mə̇|nidēən adjective , usually capitalized