yüˈpa.trə̇d, ˈyüpə.t- noun
( plural eupatri·dae yüˈpa.trəˌdē)
Usage: often capitalized
Etymology: Greek eupatridēs, from eu- + patr-, patēr father + -idēs, patronymic suffix — more at father
: one of the hereditary aristocrats of ancient Athens who in early times exclusively made and administered the law