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The word septuagenarium could not be parsed. Trying a normal dictionary lookup:
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septŭāgēnārĭus, a, um, adj. [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.