Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

sŏrōrĭo, āre, v. n. [soror], of the female breasts, to grow up or swell together, like two sisters: papillae sororiabant, Plaut. Fragm. ap. Fest. p. 297 Müll.: mammae sororiantes, Plin. 31, 6, 33, § 66.

sŏrōrĭus, a, um, adj. [soror].

  1. I. In gen., of or belonging to a sister, sisterly: cena, made because a sister was found, Plaut. Curc. 5, 2, 60: stupra, with a sister, Cic. Sest. 7, 16: moenia, i. e. of Dido, Ov. F. 3, 559: oscula, as a sister gives to a brother, sisterly, id. M. 4, 334; 9, 539.
  2. 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.