sŏrōrĭus

I. In gen., of or belonging to a sister, sisterly: cena, Plaut. Curc. 5, 2, 60: stupra, Cic. Sest. 7, 16: moenia, Ov. F. 3, 559: oscula, id. M. 4, 334; 9, 539.—

II. In partic.: Sororium Tigillum, the Sister's beam, a place in Rome sacred to Juno, where Horatius was obliged to creep under a beam laid across the way as a punishment for having killed his sister, Liv. 1, 26, 13; Aur. Vict. Vir. Ill. 4; Fest. pp. 297 and 307 Müll.