septuagenarian
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sep·tu·a·ge·nar·i·an

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

Definition of SEPTUAGENARIAN

: a person whose age is in the seventies
septuagenarian adjective

Origin of SEPTUAGENARIAN

Late Latin septuagenarius seventy years old, from Latin, of or containing seventy, from septuageni seventy each, from septuaginta
First Known Use: 1805

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