Te"trarch (?), n. [L. tetrarches, Gr. , ; (see Tetra-) + a ruler, to lead; rule: cf. F. t'etrarque. 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.
© Webster 1913.
Te"trarch, a.
Four.
[Obs.]
Fuller.
© Webster 1913.