(diminutive from Tertius ), "a certain orator," (Acts 24:1) who was retained by the high priest and Sanhedrin to accuse the apostle Paul at Caesarea before the Roman procurator Antonius Felix. He evidently belonged to the class of professional orators. We may infer that Tertullus was of Roman, or at all events of Italian, origin. (A.D. 55.)
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Smith, William, Dr. "Entry for 'Tertul’lus'". "Smith's Bible Dictionary".