[1] Horrific monster
Female monster in Greek mythology. According to the canonical version of the myth (Apollod. 2,4,1-2), Perseus must get the head of Medusa, the mortal sister of Sthenno and Euryale (Hes. Theog. 276f.; POxy. 61, 4099), the daughters of Phorcys and Ceto (cf. Aeschylus' drama Phorcides, TrGF 262). The three sisters live on the island of Sarpedon in the ocean (Cypria, fr. 23; Pherecydes FGrH 3 F 11), although Pindar (Pyth. 10,44-48) …