Webster’s Revised Unabridged Dictionary · 1913
Triarchy
Tri′ar·chy (trī′är·ky̆), n.; pl. Triarchies (#). [Gr. τριαρχία; τρι- (see Tri-) + ἄρχειν to rule.] Government by three persons; a triumvirate; also, a country under three rulers. Holland.
Webster’s Revised Unabridged Dictionary · 1913
Tri′ar·chy (trī′är·ky̆), n.; pl. Triarchies (#). [Gr. τριαρχία; τρι- (see Tri-) + ἄρχειν to rule.] Government by three persons; a triumvirate; also, a country under three rulers. Holland.