What does Nīliacus mean in Latin?

Nīliacus, a adjective, means “Nilotic; belonging to the Nile; Egyptian”.

How do you pronounce Nīliacus?

In classical Latin, [niːˈli.a.kʊs]; in ecclesiastical (church) Latin, [niˈliː.a.kus].

adjectivefirst/second-declension adjective

Nīliacus (feminine Nīliaca, neuter Nīliacum)

Classical[niːˈli.a.kʊs]Ecclesiastical[niˈliː.a.kus]

singular
form	masculine	feminine	neuter
nominative	Nīliacus	Nīliaca	Nīliacum
genitive	Nīliacī	Nīliacae	Nīliacī
dative	Nīliacō	Nīliacae	Nīliacō
accusative	Nīliacum	Nīliacam	Nīliacum
ablative	Nīliacō	Nīliacā	Nīliacō
vocative	Nīliace	Nīliaca	Nīliacum

plural
form	masculine	feminine	neuter
nominative	Nīliacī	Nīliacae	Nīliaca
genitive	Nīliacōrum	Nīliacārum	Nīliacōrum
dative	Nīliacīs	Nīliacīs	Nīliacīs
accusative	Nīliacōs	Nīliacās	Nīliaca
ablative	Nīliacīs	Nīliacīs	Nīliacīs
vocative	Nīliacī	Nīliacae	Nīliaca

Nīlĭăcus, a, um, v. Nilus, II.

From Nīlus (“the Nile”).