septuagenary
adjective
sep·tu·agenary
¦septəwə¦jenərē,
-pchəw-,
-¦jēn-;
-¦wajəˌnerē
1
: based on the number 70
2
: 70 or between 70 and 80 years old
Word History
Etymology
Latin septuagenarius, from septuageni seventy each (from septuaginta seventy) + -arius -ary