a. Now rare. [f. as prec. + -AL.] = prec.; also † of a country: Ruled by tetrarchs; divided into tetrarchies (obs.).
1638. Sir T. Herbert, Trav. (ed. 2), 21. The whole Ile is Tetrarchicall, 4 severall Kings swaying their Ebony Scepters in each Toparchy.
1646. Sir T. Browne, Pseud. Ep., V. x. (1650), 212. The Tetrarchicall or generall banners, of Judah, Ruben, Ephraim and Dan.
a. 1751. Bolingbroke, Ess. Author. Matters Relig., xxxii. The patriarchs had a sort of tetrarchical, or ethnarchical authority, for I suppose it is not easy to distinguish them.