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 (sĕn′ə-zō′ĭk, sē′nə-)
Of, relating to, or being the most recent era of geologic time, from about 66 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.

[Greek kainos, new; see ken- in Indo-European roots + -zoic.]


(ˌsiːnəʊˈzəʊɪk) or




(Geological Science) 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
(Geological Science) the Cenozoic the Cenozoic era
[C19: from Greek kainos new, recent + zōikos, from zōion animal]


(ˌsi nəˈzoʊ ɪk, ˌsɛn ə-)
1. noting or pertaining to the present era, beginning 65 million years ago, characterized by the ascendancy of mammals. See geologic time.
2. the Cenozoic Era or group of systems.
[1850–55; < Greek kainó(s) recent + -zoic]


The most recent era of geologic time, from about 65 million years ago to the present. The Cenozoic Era is characterized by the formation of modern continents and the diversification of mammals and plants. See Chart at geologic time.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Cenozoic - approximately the last 63 million yearsCenozoic - approximately the last 63 million years
Phanerozoic, Phanerozoic aeon, Phanerozoic eon - the period from about 5,400 million years ago until the present
Age of Man, Quaternary, Quaternary period - last 2 million years
Tertiary, Tertiary period - from 63 million to 2 million years ago
Adj.1.Cenozoic - of or relating to or denoting the Cenozoic era
References in periodicals archive ?
It features similar Paleozoic stratigraphic formations and silicic Cenozoic volcanic rocks that host large gold deposits elsewhere in Nevada.
The data sets from both surveys have been processed through an advanced velocity modeling and depth imaging sequence, including multi-layer tomography and full-waveform inversion, to deliver outstanding results, with exceptional clarity and deep imaging quality, from the Triassic/Jurassic fault blocks, through the Cretaceous section and up to the Cenozoic reservoirs.
The Niger Delta has three major depositional prisms: (1) a Cretaceous deltaic complex developed 600 miles inland from the mouth of the Niger Delta, (2) a Late Cretaceous to Palaeogene "proto Niger" delta complex formed seawards of the earlier delta, and (3) the younger Cenozoic complex built out over newly formed oceanic crust as the South Atlantic opened during the separation of the South American and African tectonic plates.
Oil shale deposits range widely in age from the Late Paleozoic to the Cenozoic, and were formed in a variety of depositional environments, including fresh-water, brackish and salt lakes, as well as limnic and coastal swamps, commonly in association with the deposits of coal and gypsum.
I mulled all this over as I continued the tour through the Cenozoic Hall, and I started to feel pretty small.
Three of the cores were sampled along the northern limit of the Cenozoic fold belt, another to the northwest.
Its distinctive features are a Variscan basement uplifted during the Cenozoic (the Central System Range) bounded by two continental basins (the Duero and Madrid basins) (Fig.
In sections on Precambrian, Palaeozoic, Mesozoic, and Cenozoic, the topics include the great oxygenation, ancient scorpions, halfway to mammals, sexual selection, grassed up, stuck in time, left-handed snails, and Sirenian slaughter.
It summarizes the Cenozoic evolution of the major deserts of the Americas, Eurasia, Africa, and Australia; examines causes of historic floods and droughts and desertification; proposes key conditions for achieving ecologically sustainable use of natural resources in arid and semiarid areas; and examines how human activities may have influenced dry-land degradation and local, regional, and global climate.
Dr Stepan Ivantsov, a scientific researcher in the Laboratory of Mesozoic and Cenozoic Continental Ecosystems, said: "We can confidently say we have found a new species.
During the Cenozoic Era, about 65 million years ago, a species of giant shark called the Megalodon ruled and dominated the ancient seas and oceans of the world.
His research interests include ichnology and geology of the lower Paleozoic of north Wales, the Paleozoic of eastern Canada and Maine, and the Cenozoic of the Antilles.