[ pey-lee-uh-zoh-ik or, especially British, pal-ee- ]
/ ˌpeɪ li əˈzoʊ ɪk or, especially British, ˌpæl i- /
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noting or pertaining to an era occurring between 570 million and 230 million years ago, characterized by the advent of fish, insects, and reptiles.
the Paleozoic Era or group of systems.
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OTHER WORDS FROM Paleozoicpost-Pa·le·o·zo·ic, adjectivepre-Pa·le·o·zo·ic, adjective
Words nearby Paleozoic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Paleozoic in a sentence
Eastward tilting and deposition of Martinsburg shale; oscillations during later Paleozoic time.
Turning to the Paleozoic Amphibia, there are two groups in which some likelihood of a relationship with modern order exists.The Ancestry of Modern Amphibia: A Review of the Evidence|Theodore H. Eaton
The blastoids became more abundant in the Devonian, culminated in the Carboniferous, and disappeared at the end of the Paleozoic.
The deformation therefore took place about the close of the Paleozoic.
Evidently the lands within the Arctic Circle enjoyed a warm and genial climate, as they had done during the Paleozoic.
Scientific definitions for Paleozoic
[ pā′lē-ə-zō′ĭk ]
The era of geologic time from about 540 to 245 million years ago. The beginning of the Paleozoic Era is characterized by a great diversity of marine invertebrate animals. Primitive fish and reptiles, land plants, and insects also first appeared during this time. The end of the Paleozoic is marked by the largest recorded mass extinction in the Earth's history, which wiped out nearly 90% of known marine life forms. See Chart at geologic time.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.