regium

• (Classical Latin) IPA^(key): /ˈreː.ɡi.um/, [ˈreːɡiʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈre.d͡ʒi.um/, [ˈrɛːd͡ʒium]

rēgium

1. inflection of rēgius:
   1. nominative/accusative/vocative neuter singular
   2. accusative masculine singular

• regium in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)