Greek - A monster in the form of a serpentwoman. Offspring of Tartarus and Gaea or of Chrysaor and Callirrhoe. Sister of Geryon. Mother of Cerberus, the Chimaera, the Colchian dragon, the Harpies, the Hydra, Ladon, the Nemean Lion, Orthrus and, some say, the Sphinx, by Typhon. Some say that Echidna and Ladon were the offspring, with the Graiae and the Gorgons, of Phorcys and Ceto. She was killed by Argus. In one version of the story in which Heracles seized Geryon's cattle, the snake-woman with whom he slept was Echidna and she later bore three sons, Agathyrsus, Gelonus and Scythes. In some accounts, Echidna was the mother of the Blatant Beast. Also identified as Echidna, Echidne, Echidne, Ekhidna, Ekhidna, 'snake', 'snake', Delphine, Delphine or Delphyne.

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