designating or of the third geologic era of the Phanerozoic Eon, formerly subdivided into the Tertiary and Quaternary periods and now subdivided into the Paleogene, Neogene, and Quaternary periods, characterized by the development of birds and mammals
Origin of Cenozoicceno- (; from Classical Greek kainos: see -cene) + -zoic
the Cenozoic Era or its rocks
Of, relating to, or being the most recent era of geologic time, from about 65 million years ago to the present. The Cenozoic Era includes the Tertiary Period and the Quaternary Period and is characterized by the formation of modern continents, glaciation, and the diversification of mammals, birds, and plants. See Table at geologic time.
The Cenozoic Era.
Origin of CenozoicGreek kainos, new; see ken- in Indo-European roots + –zoic.
- (geology) Of or pertaining to the Cenozoic era.
ceno- + -zoic; from Ancient Greek καινός (kainós, “new”) + ζωή (zōē, “life”)