regiae
regiae is a Latin form of regius, meaning “royal, of a king”. It is the nominative plural feminine adjective or vocative plural feminine adjective or dative singular feminine adjective or genitive singular feminine adjective.
Found 140 times in the Latin texts on Socratos.
Where it is used
Caesar, De Bello Civili 3.112: … utrimque interfectis Caesar loca maxime necessaria complexus noctu praemuniit. In eo tractu oppidi pars erat regiae exigua, in quam ipse habitandi causa initio erat inductus, et theatrum coniunctum domui quod areis tenebat lo …
All forms of regius (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.