Lewis & Short

testĭfĭcātĭo, ōnis, f. [testificor], a bearing witness, giving testimony, testifying, testification (Ciceron.; whereas testatio is found in the jurists and in Quint.; v. testatio, I.).

  1. 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.
  2. II. 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.