aerum

• (Classical Latin) IPA^(key): /ˈaː.e.rum/, [ˈäːɛrʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈa.e.rum/, [ˈäːerum]

āerum

1. genitive plural of āēr

• (Classical Latin) IPA^(key): /ˈae̯.rum/, [ˈäe̯rʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈe.rum/, [ˈɛːrum]

aerum

1. genitive plural of aes

• aerum 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)