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Webster 1913 Edition

Adj.

Consisting of seventy days, years, etc.; reckoned by seventies.

Our abridged and

septuagesimal

age.

Sir T. Browne.

Adj.

[supra.] Cosisting of seventy.

Our abriged and septuagesimal age. Brown.

septuagesimal ‎(not comparable)

Consisting of seventy days, years, etc.; reckoned by seventies.
Our abridged and septuagesimal age. — Sir Thomas Browne.