What does Tegeaeus mean in Latin?

Tegeaeus, a adjective, means “Tegean, Arcadian”.

How do you pronounce Tegeaeus?

In classical Latin, [tɛ.ɡeˈae̯.ʊs]; in ecclesiastical (church) Latin, [te.d͡ʒeˈɛː.us].

adjectivefirst/second-declension adjective

Tegeaeus (feminine Tegeaea, neuter Tegeaeum)

Classical[tɛ.ɡeˈae̯.ʊs]Ecclesiastical[te.d͡ʒeˈɛː.us]

adjectiveTegean, Arcadian
[...] hic erat affixis viridis spelunca lapillis, pendebantque cavis tympana pumicibus, orgia Musarum et Sileni patris imago fictilis et calami, Pan Tegeaee, tui; [...]30 BCE – 16 BCE, Propertius, Elegiae 3.3

singular
form	masculine	feminine	neuter
nominative	Tegeaeus	Tegeaea	Tegeaeum
genitive	Tegeaeī	Tegeaeae	Tegeaeī
dative	Tegeaeō	Tegeaeae	Tegeaeō
accusative	Tegeaeum	Tegeaeam	Tegeaeum
ablative	Tegeaeō	Tegeaeā	Tegeaeō
vocative	Tegeaee	Tegeaea	Tegeaeum

plural
form	masculine	feminine	neuter
nominative	Tegeaeī	Tegeaeae	Tegeaea
genitive	Tegeaeōrum Tegeaeåorum	Tegeaeārum	Tegeaeōrum Tegeaeåorum
dative	Tegeaeīs	Tegeaeīs	Tegeaeīs
accusative	Tegeaeōs	Tegeaeās	Tegeaea
ablative	Tegeaeīs	Tegeaeīs	Tegeaeīs
vocative	Tegeaeī	Tegeaeae	Tegeaea

Charlton Lewis's shorter dictionary for students: the same scholarship in plain, modern definitions.

Tegeaeus (-eēus) adj.,

of Tegea (in Arcadia); hence, Arcadian, V., O.—As subst f., Atalanta, O.