Amphitryon ămfĭ´trēən, –ŏn˝ [key], in Greek mythology, son of Alcaeus. While betrothed to Alcmene, he accidentally killed her father, Electryon. Alcmene and Amphitryon fled to Thebes, but she demanded that he defeat Pterelaos, her father's enemy. This Amphitryon did, but on the night of his return Zeus took Amphitryon's form and came into Alcmene's bed. That night she conceived children by both Zeus and Amphitryon. Hercules was the son of Zeus, Iphicles the son of Amphitryon.

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