ex·o·cy·cla \ˌeksōˈsīklə\ orex·o·cyc·li·ca\-ˈsiklə̇kə\ Etymology: New Latin, from exo- + -cycla (from Greek kyklos ring, circle, wheel) or -cyclica (from Greek kyklika, neuter plural of kyklikos circular, cyclic, from kyklos + -ikos -ic) — more at wheel synonym of exocycloida