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a. A subordinate ruler.
b. One of four joint rulers.
2. A governor of one of four divisions of a country or province, especially in the ancient Roman Empire.
3. The commander of a subdivision of a phalanx in ancient Greece.
[Middle English tetrarche, a Roman tetrarch, from Old French, from Late Latin tetrarcha, from Latin tetrarchēs, from Greek tetrarkhēs : tetra-, tetra- + -arkhēs, -arch.]
te·trar′chic (tĕ-trär′kĭk, tē-) adj.
1. (Government, Politics & Diplomacy) the ruler of one fourth of a country
2. (Historical Terms) a subordinate ruler, esp of Syria under the Roman Empire
3. (Historical Terms) the commander of one of the smaller subdivisions of a Macedonian phalanx
4. (Government, Politics & Diplomacy) any of four joint rulers
[C14: from Greek tetrarkhēs; see tetra-, -arch]
teˈtrarchic, teˈtrarchical adj
te•trarch(ˈtɛ trɑrk, ˈti-)
1. the ruler of a fourth part, division, etc., as of a country or province in the Roman Empire.
2. a subordinate ruler or minor king, esp. in W Asia under the Roman Empire.
3. one of four joint rulers or chiefs.
[1350–1400; Middle English tetrarcha, tetrarke < Late Latin tetrarcha, Latin tetrarchēs < Greek tetrárchēs. See tetra-, -arch]
te′trar•chy, te′trarch•ate` (-ˌkeɪt) n.
te•trar′chic, te•trar′chi•cal, adj.