tetrarchy
noun pl. tetrarchies
- the rule or territory of a tetrarch
- government by four persons
See tetrarchy in American Heritage Dictionary 4
(tĕtˈrärˌkē, tēˈträrˌ-) also tet·rar·chate (-kātˌ, -kĭt)
noun pl. tet·rar·chies also
tet·rar·chates - The area ruled by a tetrarch.
a. Joint rule by four governors.
b. The four governors so ruling.