Lewis & Short

Ăgămemnon, ŏnis, m. (nom. Agamemno, Enn. ap. Cic. Att. 13, 47; Cic. Tusc. 4, 8, 17; Stat. Achill. 1, 553), = Ἀγαμέμνων, king of Mycenœ, son of Atreus and of Aërope, brother of Menelaüs, husband of Clytœmnestra, father of Orestes, Iphigenia, and Electra, commander-in-chief of the Grecian forces before Troy, and murdered by his wife, with the aid of Ægisthus, her paramour.
Poet., for his time: vixēre fortes ante Agamemnona Multi, Hor. C. 4, 9, 25- 28.

    1. 1. Ăgămemnŏnĭdēs, ae, patr. m., = Ἀγαμεμνονίδης, a male descendant of Agamemnon; his son Orestes: par Agamemnonidae crimen, i. e. the matricide of Orestes, Juv. 8, 215.
    2. 2. Ăgămem-nŏnĭus, a, um, adj., = Ἀγαμεμνόνιος, of or pertaining to Agamemnon (poet.): phalanges, i. e. the Grecian troops before Troy, commanded by Agamemnon, Verg. A. 6, 489: Mycenae, ruled by Agamemnon, id. ib. 6, 838: Orestes, son of Agamemnon, id. ib. 4, 471: puella, daughter of Agamemnon, i. e. Iphigenia, Prop. 5, 1, 111.