Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Of, relating to, or being the era of geologic time from about 542 to 251 million years ago. The Paleozoic Era includes the Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and Permian Periods and is characterized by the appearance of marine invertebrates, primitive fishes, land plants, and primitive reptiles. The end of this era is marked by the largest recorded mass extinction in the earth's history, in which 90 percent of marine life forms were wiped out.
- noun The Paleozoic Era.
from The Century Dictionary.
- In geology, belonging to or constituting a geological formation characterized by the presence of ancient forms of life: applied to the oldest division of the geological series, beginning with the lowest stratified fossiliferous group, and extending upward to the base of the Triassic, or to the top of the Permian.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Geol.) The Paleozoic time or strata.
- adjective (Geol.) Of or pertaining to, or designating, the older division of geological time during which life is known to have existed, including the Silurian, Devonian, and Carboniferous ages, and also to the life or rocks of those ages. See
Chart ofgeology .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective geology Of a
geologic era within thePhanerozoic eon that comprises theCambrian ,Ordovician ,Silurian ,Devonian ,Carboniferous andPermian periods from about 542 to 250 million years ago, from the age oftrilobites to that ofreptiles . - proper noun geology The Paleozoic era.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun from 544 million to about 230 million years ago
- adjective of or relating to or denoting the Paleozoic era
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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Müller & Tsuji, Impedance-Matching Hearing in Paleozoic Reptiles: Evidence of Advanced Sensory Perception at an Early Stage of Amniote Evolution, PLoS ONE 2007.
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The beginning of the Paleozoic is the definitional start of the Edenic Period, a time span in evolutionary biology that demarcates the initial time taken for the computation of background extinction rates of biota; the Edenic Period is taken to end with the ascent of modern man (e.g. approximately 50,000 to 10,000 years before present).
Paleozoic 2009
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The second volume of the geological record, called the Paleozoic (Greek, PALAIOS, ancient; ZOE, life), has come down to us far less mutilated and defaced than has the first volume, which contains the traces of the most ancient life of the globe.
The Elements of Geology William Harmon Norton 1900
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They lived through "Paleozoic" time, which, according to Dana, represents twelve of the sixteen parts of all geological time, beginning with the Primordial; or, calling the whole geological time 48 millions of years, the trilobites lived 36 million of years, or three-fourths of all geological time.
Evolution An Investigation and a Critique Theodore Graebner 1913
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The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles.
February 2009 2009
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The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles.
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Georgetown is still on top, as they've been since the late Paleozoic, although five other teams got first-place votes.
Atlantic 11 Week 9: Georgetown. Your Town. Dan Steinberg 2011
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The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles.
Web/Tech 2009
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 Terry makes several jumps in time — to Siberia, then to the British Isles, then to the Paleozoic era and then to 2026 — where he finds himself with an aged Eric Bellmont.
New episode of Time Jumper arrives on iTunes | Major Spoilers - Comic Book Reviews and News 2009
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You can almost hear giant Paleozoic dragonflies pausing to the mechanical alien sound of the watch.
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