The correct spelling of the geological era between the Mesozoic and the Cenozoic is "Cenozoic." Often mistakenly spelled "Caryozoic," the correct pronunciation is /siːnəˈzoʊɪk/ (see-nuh-zoh-ik). The word "Cenozoic" translates from Greek as "recent life," referring to the dominance of modern animals and plants during this time period. The Cenozoic era is divided into three periods: the Paleogene, Neogene, and Quaternary, and began about 66 million years ago with the extinction of the dinosaurs.
Nothing a protozoan parasite inhabiting the cell nucleus of its host.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.