A Roman governor of the fourth part of a province; hence, any subordinate or dependent prince; also, a petty king or sovereign.
Te′trarch
,
Adj.
Four.
[Obs.]
Fuller.
Webster 1828 Edition
Tetrarch
TE'TRARCH
,
Noun.
[Gr. four, and rule.] A Roman governor of the fourth part of a province; a subordinate prince. In time, this word came to denote any petty king or sovereign.