cy·clo·spon·dyl·ic \| ̷ ̷ ̷ ̷|spän|dilik\adjective alsocy·clo·spon·dy·lous\| ̷ ̷ ̷ ̷|spändələs\ Etymology: New Latin Cyclospondyli + English -ic or -ous : having a single calcified cylinder surrounding the notochord in each vertebral centrum — used especially of certain sharks