septŭāgēnārĭus — Lewis & Short
septŭāgēnārĭus, a, um, adj.septuageni,
I 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.