Cenozoic

Cenozoic

[see-nuh-zoh-ik, sen-uh-] Geology.
adjective
1.
noting or pertaining to the present era, beginning 65 million years ago and characterized by the ascendancy of mammals. See table under geologic time.
noun
2.
the Cenozoic Era or group of systems.
Also, Cainozoic.


Origin:
1850–55; ceno-1 + zo- + -ic

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
Cenozoic, Caenozoic or Cainozoic (ˌsiːnəʊˈzəʊɪk)
 
adj
1.  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
 
n
2.  the Cenozoic the Cenozoic era
 
[C19: from Greek kainos new, recent + zōikos, from zōion animal]
 
Caenozoic, Caenozoic or Cainozoic
 
adj
 
n
 
[C19: from Greek kainos new, recent + zōikos, from zōion animal]
 
Cainozoic, Caenozoic or Cainozoic
 
adj
 
n
 
[C19: from Greek kainos new, recent + zōikos, from zōion animal]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

Cenozoic
1854, Cainozoic, from Gk. kainos "recent" (see recent) + zoon "animal" (see vital).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
Cenozoic   (sěn'ə-zō'ĭk)  Pronunciation Key 
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. Grasses also evolved during the Cenozoic. The climate was warm and tropical toward the beginning of the era and cooled significantly in the second half, leading to several ice ages. Humans first appeared near the end of this era. See Chart at geologic time.
The American Heritage® Science Dictionary
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