cælum
cælum, -i n.
noun, 2nd declension
cæ-lum · /ˈtʃɛ.lum/
heaven, sky
The plural “cæli” is masculine; biblical Latin often speaks of heaven in the plural, after the Hebrew idiom.
in the texts
Regína cæli cæli
Sanctus cæli
Adiutórium nostrum cælum
Súscipe, sancta Trínitas cælis
Præfatio communis Cæli, cælorúmque
Qui prídie cælum
Unde et mémores cælos
external dictionary: Logeion