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Webster 1913 Edition
Septuagenary
Sepˊtu-ag′e-na-ry
,Adj.
 [L. 
septuagenarius
, fr. septuageny 
seventy each; akin to septuaginta 
seventy, septem 
seven. See Seven
.] Consisting of seventy; also, seventy years old. 
– Noun.
 A septuagenarian.
 Webster 1828 Edition
Septuagenary
SEPTUAG'ENARY
,Adj.
  SEPTUAG'ENARY
,Noun.
  Definition 2025
septuagenary
septuagenary
English
Adjective
septuagenary (not comparable)
- Consisting of seventy; seventy years old.
 
Noun
septuagenary (plural septuagenaries)