magistratuum
magistratuum is a Latin form of magistratus, meaning “magistrate; office”. It is the genitive plural masculine noun.
Found 121 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 7.39.2: His erat inter se de principatu contentio, et in illa magistratuum controversia alter pro Convictolitavi, alter pro Coto summis opibus pugnaverant.
All forms of magistratus (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.