The Collaborative International Dictionary of English v.0.48:
Kithara \Kith"a*ra\ (k[i^]th"[.a]*r[.a]), n. See Cithara. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Cithara \Cith"a*ra\, n. [L. Cf. Cittern, Guitar.] (Mus.) An ancient stringed musical instrument resembling the harp. [Also spelled kithara.] [1913 Webster]