quad·rum·vi·rate 
(kwŏ-drŭmvər-ĭt)
(kwŏ-drŭmvər-ĭt)n.
A group of four people joined in authority or office, especially a government of four people.
[QUADR(I)- + (TRI)UMVIRATE.]
- histogenic
- histogenically
- histogram
- histologic
- histological
- histologically
- histologist
- histology
- histolysis
- histolytic
- histomoniasis
- histone
- histopathologic
- histopathological
- histopathologically
- histopathologist
- histopathology
- histophysiologic
- histophysiological
- histophysiology
- histoplasmosis
- historian
- historiated
- historic
- historical