Contradictio, onis, f. g. Verbale. Quint. A contradiction: a speaking contrary.
Lewis and Short: Latin dictionary
contrādictĭo, ōnis, f. [contradico], a reply, answer, objection, counter-argument (post-Aug.; most freq. in Quint. of judicial replications): ubi contradictioni locus non erit, Quint. 3, 8, 34; so id. 3, 8, 27; 5, 13, 48 sq.; 7, 3, 20; Sen. Prov. 1, 1, 1; id. Q. N. 1, 5, 11: sumere,