(Φορκίδες), PHORCYDES, or PHORCYNIDES, that is, the daughters of Phorcus and Ceto, or the Gorgons and Graeae. (Aeschyl. Prom. 794; Ov. Met. 4.742, 774, 5.230 ; Hygin. Fab. Praef. p. 9; comp. GORGON and GRAEAE.)
[L.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890