Search Result for "aegisthus": 
Wordnet 3.0

NOUN (1)

1. (Greek mythology) the seducer of Clytemnestra and murderer of Agamemnon who usurped the throne of Mycenae until Agamemnon's son Orestes returned home and killed him; 



WordNet (r) 3.0 (2006):

Aegisthus
    n 1: (Greek mythology) the seducer of Clytemnestra and murderer
         of Agamemnon who usurped the throne of Mycenae until
         Agamemnon's son Orestes returned home and killed him