regionem
regionem is a Latin form of regio, meaning “direction, line; region, area, district; boundary”. It is the accusative singular feminine noun.
Found 133 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Gallico 6.33.2: Gaium Trebonium cum pari legionum numero ad eam regionem quae ad Aduatucos adiacet depopulandam mittit;
All forms of regio (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.