Tribunitian, Tribunitial, Tribunician adj. Of or pertaining to tribunes; befitting a tribune; as, tribunitial power or authority. "A kind of tribunician veto, forbidding that which is recognized to be wrong."
... their colleague. At the time of the Gracchi the veto of a single tribune was sufficient to hinder the passage of a law, and Tiberius was for a long time thus checked by his colleague, Octavius. Then the tribunician college consisted of ten members, and it would be no very difficult thing to detach one of the number either by corruption or jealousy. But it is evident that, at the time we are considering, it took a majority of the tribunes to veto an act of ... — Public Lands and Agrarian Laws of the Roman Republic • Andrew Stephenson