Lewis Short
antĭthĕton (noun N) = ἀντίθετον:
* Opposition,antithesis, a rhetor. fig., Cic. Or. 50, 166; Pers. 1, 85 (e. g. frigida pugnabant calidis, humentia siccis, Ov. M. 1, 19; cf. Quint. 9, 3, 81).
Charlton T. Lewis, Charles Short, A Latin Dictionary