What does paleozoic mean?
Paleozoic is the name of the major geological era that followed the Precambrian and preceded the Mesozoic. It is used chiefly as an adjective, as in “Paleozoic Era,” “Paleozoic rocks,” or “Paleozoic fossils.” The capitalized form names the formal interval in Earth history, while the lowercase adjective describes materials, organisms, events, or landscapes associated with that interval. The word has a technical, scientific register and is most often encountered in geology, paleontology, evolutionary biology, and the study of fossil fuels. It does not simply mean “old” in a general sense: the Paleozoic was a specific era, lasting roughly from 541 million to 252 million years ago under widely used modern boundaries. During it, life diversified extensively in the oceans, plants and several animal groups appeared on land, and the continents took recognizable forms. The name combines Greek roots meaning “old” and “life,” making it especially appropriate for the extensive fossil record preserved from that immense span of time.
adjectiveOf or relating to the Paleozoic Era, the major geological era extending from about 541 million to 252 million years ago, or to the organisms, rocks, and fossils associated with that era.
- Relating to the Paleozoic Era or to the geological history and forms of life associated with it.
"The museum's remarkable fossil ferns came from paleozoic shale."
"The museum's remarkable fossil ferns came from paleozoic shale."
"Researchers discovered several paleozoic fossils while examining the rocky outcrop."
Paleozoic literally means “ancient life”—a colossal label for the era when life transformed the oceans and continents.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of paleozoic
The term was formed in English during the 19th century from Greek palaios, meaning “old,” and zōē, meaning “life,” with the second element used in the combining form -zoic. It was adopted as a geological designation for the extensive era of early fossil-bearing rocks and the history of life within it. Related English formations such as paleontology, paleontologist, and paleozoology combine the same elements for the study of ancient organisms and animals.
How paleozoic is actually used
This is a formal scientific and historical term used especially in geology, paleontology, evolutionary biology, and the study of fossil fuels. The formal era name is normally capitalized as “Paleozoic Era”; when functioning as an ordinary adjective, lowercase is also widely used.
Easily confused with paleozoic
Paleozoic names a major geological era, whereas the Paleocene is the first epoch of the Cenozoic Era and belongs to a much later period.