Webster's Revised Unabridged Dictionary · 1913

Tribunician

Tribunician , adjective

[Latin tribunicius, tribunitius: compare French tribunitien.]

Of or pertaining to tribunes; befitting a tribune; as, tribunitial power or authority. — Dryden
A kind of tribunician veto, forbidding that which is recognized to be wrong. — Hare

Also: Tribunitian, Tribunitial