grandaevĭtas

ātis, f.

grandaevus

I. great age, longevity (ante-class.), Pac. and Att. ap. Non. 116, 12 sq. (Pac. Fragm. Trag. v. 162; Att. Fragm. Trag. v. 68, 245 Rib.).
Lewis & Short
A Latin Dictionary, 1879
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