magistrum
magistrum is a Latin form of magister, meaning “master, teacher; chief, director; (magister equitum) master of the horse”. It is the genitive plural masculine noun or accusative singular masculine noun.
Found 155 times in the Latin texts on Socratos.
Where it is used
Cicero, Pro S. Roscio Amerino 17: … tur, hic autem nuper se ad eum lanistam contulit, quique ante hanc pugnam tiro esset quod sciam, facile ipsum magistrum scelere audaciaque superavit.
Ammianus Marcellinus, Res Gestae 20.9.8: … missus est ad praefecturam Nebridius; id enim Caesar quoque scribens, ex sententia sua fore aperte praedixit. Magistrum enim officiorum iam pridem ipse Anatolium ordinavit, libellis antea respondentem, et quosdam alios ut sibi ut …
All forms of magister (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.