Cenozoic Definition

sĕnə-zōĭk, sēnə-
adjective
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.
Webster's New World
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noun

(geology) A geologic era within the Phanerozoic eon comprising the Paleogene and Neogene periods from about 65 million years ago to the present, when the continents moved to their current position and modern plants and animals evolved.

Wiktionary
The Cenozoic Era.
American Heritage
Synonyms:
  • Cenozoic era
  • Age of Mammals
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Idioms, Phrasal Verbs Related to Cenozoic

  • the Cenozoic

Origin of Cenozoic

  • ceno- +‎ -zoic; from Ancient Greek καινός (kainós, “new”) + ζωή (zōē, “life”)

    From Wiktionary

  • Greek kainos new ken- in Indo-European roots –zoic

    From American Heritage Dictionary of the English Language, 5th Edition

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