Palæozoic

A form of paleozoic — Of a geologic era within the Phanerozoic eon that comprises the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods from about 542 to 250 million years ago, from the age of trilobites to that of reptiles.

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Meanings

adjectivePalæozoic (comparative more Palæozoic, superlative most Palæozoic)

comparative more Palæozoic · superlative most Palæozoic

  1. archaicArchaic spelling of Paleozoic.
proper noun
  1. archaicArchaic spelling of Paleozoic.
    1 more example

    The whole history of the earth is divided into five eras, with corresponding rock-systems. These are: 1. Archæan or Eozoic¹ era, embodied in the Laurentian system; 2. Palæozoic² era, embodied in the Palæozoic or Primary system; 3. Mesozoic³ era, recorded in the Secondary system; 4. Cenozoic,⁴ recorded in the Tertiary and Quaternary systems; and, 5. The Psychozoic era, or era of Mind, recorded in the recent system.

    1883, Joseph Le Conte, Elements of Geology: A Text-book for Colleges and for the General Reader, New York: D. Appleton and Company
Cite this entry
APA

Palæozoic. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Pal%C3%A6ozoic

MLA

“Palæozoic.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Pal%C3%A6ozoic. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Palæozoic,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Pal%C3%A6ozoic.

Source: Palæozoic on Wiktionary, CC BY-SA 4.0.