oppidis
oppidis is a Latin form of oppidum, meaning “town”. It is the ablative plural neuter noun or dative plural neuter noun.
Found 96 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 1.5.3: … quemque domo efferre iubent. Persuadent Rauracis et Tulingis et Latobrigis finitimis, uti eodem usi consilio oppidis suis vicisque exustis una cum iis proficiscantur, Boiosque, qui trans Rhenum incoluerant et in agrum Noricum …
All forms of oppidum (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.