What does acraeus mean in Latin?

acraeus, a adjective, means “that lives on high (at high latitude)”.

How do you pronounce acraeus?

In classical Latin, [aˈkrae̯.ʊs]; in ecclesiastical (church) Latin, [aˈkrɛː.us].

adjectivefirst/second-declension adjective

acraeus (feminine acraea, neuter acraeum)

Classical[aˈkrae̯.ʊs]Ecclesiastical[aˈkrɛː.us]

singular
form	masculine	feminine	neuter
nominative	acraeus	acraea	acraeum
genitive	acraeī	acraeae	acraeī
dative	acraeō	acraeae	acraeō
accusative	acraeum	acraeam	acraeum
ablative	acraeō	acraeā	acraeō
vocative	acraee	acraea	acraeum

plural
form	masculine	feminine	neuter
nominative	acraeī	acraeae	acraea
genitive	acraeōrum	acraeārum	acraeōrum
dative	acraeīs	acraeīs	acraeīs
accusative	acraeōs	acraeās	acraea
ablative	acraeīs	acraeīs	acraeīs
vocative	acraeī	acraeae	acraea

Acraeus, a, um, adj., = ἀκραῖος,

I. dwelling on the heights; an epithet of Jupiter and of Juno, whose temples stood on heights, Liv 38, 2; 32, 23.

Borrowed from Ancient Greek ἀκραῖος (akraîos).