Dictionary entry

Tetrarch

Webster's Dictionary 1913

Te″trarch (?), n. [L. tetrarches, Gr. �, �; τέτρα- (see Tetra-) + � a ruler, � to lead; rule: cf. F. tétrarque. See Arch, a.] (Rom. Antiq.) A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign.