[401] Phlegĕthon, Pyriphlegeton (grch., »der Feuerflammende«), mythischer Strom der Unterwelt.
Brockhaus-1809: Phlegethon
Hederich-1770: Phlegethon
Herder-1854: Phlegethon
Meyers-1905: Phlégethōn
Pierer-1857: Phlegĕthon
Vollmer-1874: Phlegethon