Definition of Cenozoic
: of, relating to, or being an era of geological history that extends from the beginning of the Tertiary period to the present time and is marked by a rapid evolution of mammals and birds and of angiosperms and especially grasses and by little change in the invertebrates; also : relating to the corresponding system of rocks — see geologic time table
Origin and Etymology of cenozoic
Greek kainos + English -zoic
First Known Use: 1841
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