Lewis Short
(adjective) : septŭāgēnārĭus, a, um, septuageni
* Of or belonging to the number seventy, containing seventy, septuagenarian: fistula,seventy quarter-digits broad,Front. Aquaed. 56: homo,a man of seventy, a septuagenarian,Dig. 50, 6, 5, § 7.
Charlton T. Lewis, Charles Short, A Latin Dictionary