Lewis & Short

Clytaemnēstra (Clytemnēstra, Liv. Andron. 11 Rib.; mutilated into Cly-temēstra, Cass. Hemin. ap. Serv. ad Verg. A. 7, 631; hence the second syllable short in Aus. Epit. Her. 1, 1, 4), ae, f., = Κλυταιμνήστρα,

  1. I. the daughter of Tyndarus and Leda, and sister of Helen, Castor, and Pollux; wife of Agamemnon and mother of Orestes, Iphigenia, and Electra; she, with her paramour, Aegisthus, murdered her husband on his return from Troy, and was on that account put to death by her son Orestes, Hyg. Fab. 117 and 240; Serv. ad Verg. A. 2, 601; 3, 331; 4, 471; Auct. Her. 1, 10, 17; 1, 16, 21; Cic. Inv. 1, 13, 18; Ov. Am. 1, 7, 9; id. Nux, 26.
  2. II. As title of a tragedy of Attius, Cic. Off. 1, 31, 14; id. Fam. 7, 1, 2 al.
    1. B. Appellative for an unfaithful wife, Cael. ap. Quint. 8, 6, 53.