cy·clo·sis 
(sī-klōsĭs)
(sī-klōsĭs)n. pl. cy·clo·ses (-sēz)
The streaming rotary motion of protoplasm within certain cells and one-celled organisms.
[New Latin, from Greek kuklōsis, a surrounding, from kukloun, to surround, from kuklos, circle; see kwel-1 in the Appendix of Indo-European roots.]