ἀμπύκωμα
From LSJ
Φερσεφόνας κυάνεος θάλαμος → dark chamber of Persephone
English (LSJ)
τό, = ἄμπυξ (woman's diadem, frontlet, horse's headband, rim of wheel, woman's head-band, snood, anything circular, wheel), S. Fr. 1002 (pl.).
Spanish (DGE)
-ματος, τό
• Prosodia: [-ῠ-]
diadema A.Supp.235, S.Fr.1002.