Main Entry: sep·tu·a·ge·nar·i·an

Pronunciation: \(ˌ)sep-ˌtü-ə-jə-ˈner-ē-ən, -ˌtyü-, -ˌchü-\

Function: noun

Etymology: Late Latin septuagenarius seventy years old, from Latin, of or containing seventy, from septuageni seventy each, from septuaginta

Date: 1805

: a person whose age is in the seventies

— septuagenarian adjective