(ˌkaɪnəʊˈzəʊɪk; ˌkeɪ-) adj (Geological Science) a variant of Cenozoic
Cainozoic
Cenozoic
, Caenozoic, Cainozoic of, denoting, or relating to the most recent geological era, which began 65 000 000 years ago: characterized by the development and increase of the mammals