mon·o·cyte 
(mŏnə-sīt′)
(mŏnə-sīt′)n.
A large white blood cell that circulates in the blood and then migrates into the tissues, where it matures into a macrophage. Monocytes have a single well-defined nucleus.
mon′o·cytic (-sĭtĭk), mon′o·cytoid′ (-sītoid′) adj.
monocytesurrounded by red blood cells