sororum
sororum is a Latin form of soror, meaning “sister”. It is the genitive plural feminine noun.
Found 72 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.18.7: ipsum ex Helvetiis uxorem habere, sororum ex matre et propinquas suas nuptum in alias civitates conlocasse.
Propertius, Elegiae 3.1.17: sed, quod pace legas, opus hoc de monte Sororum
All forms of soror (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.