LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

archaeus

archaeus (feminine archaea, neuter archaeum)

Meaning

  1. adjectiveancient, old

Declension

singular
formmasculinefeminineneuter
nominativearchaeusarchaeaarchaeum
genitivearchaeīarchaeaearchaeī
dativearchaeōarchaeaearchaeō
accusativearchaeumarchaeamarchaeum
ablativearchaeōarchaeāarchaeō
vocativearchaeearchaeaarchaeum
plural
formmasculinefeminineneuter
nominativearchaeīarchaeaearchaea
genitivearchaeōrumarchaeārumarchaeōrum
dativearchaeīsarchaeīsarchaeīs
accusativearchaeōsarchaeāsarchaea
ablativearchaeīsarchaeīsarchaeīs
vocativearchaeīarchaeaearchaea

Origins

  1. Proto-Indo-European*h₂er-der.?
  2. Proto-Indo-European*h₂ergʰ-der.?
  3. Ancient Greek ἄρχω(árkhō)
  4. Ancient Greek -ᾱ(-ā)
  5. Ancient Greek -η(-ē)
  6. Ancient Greek ἀρχή(arkhḗ)
  7. Latinarchaeus

Proto-Indo-European *-yósder. Ancient Greek -ιος (-ios) Ancient Greek ἀρχαῖος (arkhaîos)bor. Latin archaeus Borrowed from Ancient Greek ἀρχαῖος (arkhaîos). * (Classical Latin) IPA⁽ᵏᵉʸ⁾: [arˈkʰae̯.ʊs] * (modern Italianate Ecclesiastical) IPA⁽ᵏᵉʸ⁾: [arˈkɛː.us]

Quick answers

What does archaeus mean in Latin?
archaeus, a adjective, means “ancient, old”.
Where does archaeus come from?
Proto-Indo-European *h₂er-der.? → Proto-Indo-European *h₂ergʰ-der.? → Ancient Greek ἄρχω (árkhō) → Ancient Greek -ᾱ (-ā) → Ancient Greek -η (-ē) → Ancient Greek ἀρχή (arkhḗ) → Latin archaeus.