CENOZOIC

[Ce.no.zo.ic] adj [Gk kainos + E -zoic] (1854): 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 esp. grasses and by little change in the invertebrates; also: relating to the corresponding system of rocks -- Cenozoic n