(Greek, Φλέγρα, Φλεγραῖον πεδίον, Φλεγραῖα πεδία; Phlégra, Phlegraîon pedíon, Phlegraîa pedía). Name of a coastal strip north of Campania (between Capua, Nola and Vesuvius: FGrH 566 Timaeus fr. 89; Pol. 2,17,1; from Cuma to Pozzuoli: Str. 5,4,4; Plin. HN 3,61; 18,111); the name was coined by the Chalcidians, who founded Cumae; Phlegra ( Pallene, Chalcidice), the volcanic home of the giants, is supposed to be the root of the place name, possibly because of this region's similar volcanic nature.
Bibliography
BTCGI 4, s.v. Campi Flegrei…