equestris
equestris is a Latin form of equester, meaning “of horsemen, cavalry; equestrian (of the knights)”. It is the genitive singular masculine adjective.
Found 101 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 5.16.3: Equestris autem proeli ratio et cedentibus et insequentibus par atque idem periculum inferebat.
All forms of equester (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.