gĕrūsĭa, ae, f., = γερουσία,
I the place of meeting for a council of old men , senatehouse in a Grecian city (= senaculum), Varr. L. L. 5, 32, § 156.—
II A public hospital or retreat in Sardes , for old men who had deserved well of their country , Vitr. 4, 8; Plin. 35, 14, 49, § 172; Plin. Ep. 10, 42.