Lewis Short
testĭfĭcātĭo (noun F) : testificor
* A bearing witness, giving testimony, testifying, testification (Ciceron.; whereas testatio is found in the jurists and in Quint.; v. testatio, I.).
* Lit.: si ejus rei testificatio tolleretur,Cic. Verr. 2, 4, 42, § 92; 2, 5, 39, § 102.—In plur., Cic. Mur. 24, 49; id. Brut. 80, 277.
* Transf., a giving evidence, attestation, proof, evidence: egit causam tuam . . . cum summā testificatione tuorum in se officiorum et amoris erga te sui,Cic. Fam. 1, 1, 2: sempiterna repudiatae legationis,id. Phil. 9, 6, 15.
Charlton T. Lewis, Charles Short, A Latin Dictionary