factionis
factionis is a Latin form of factio, meaning “faction, party; partisanship”. It is the genitive singular feminine noun.
Found 52 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.56.3: In eo concilio Cingetorigem, alterius principem factionis, generum suum, quem supra demonstravimus Caesaris secutum fidem ab eo non discessisse, hostem iudicat bonaque eius publicat.
All forms of factio (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.