ἀρχεγονία

From LSJ

πρῶτον μὲν οὖν ὄστρεια παρὰ Νηρεῖ τινι ἰδὼν γέροντι φυκί ἠμφιεσμένα ἔλαβον ἐχίνους τ' ἐστὶ γὰρ προοίμιον δείπνου χαριέντως ταῦτα πεπρυτανευμένου → So first I spotted oysters wrapped in seaweed at the shop of some old Nereus, and sea urchins, which I bought; these were the appetizers for a delightfully managed dinner

Source

Spanish (DGE)

-ας, ἡ origen Eust.Op.355.82.