cy·clo·spo·ra \ˌsīklōˈspōrə, -ˈspȯr-\noun Usage: capitalized Etymology: New Latin, from cycl- + -spora : a genus of coccidian sporozoans that produce an oocyst containing two sporocysts with each sporocyst containing two sporozoites and that include one (C. cayetanensis) causing diarrhea in humans