Definitions for ordovician
ˌɔr dəˈvɪʃ ənor·dovi·cian

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Ordovician, Ordovician periodnoun

   from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

WiktionaryRate this definition:0.0 / 0 votes

1. Ordovicianadjective

   Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.

2. Ordoviciannoun

   The Ordovician period.

WikipediaRate this definition:0.0 / 0 votes

1. Ordovician

   The Ordovician ( or-də-VISH-ee-ən, -⁠doh-, -⁠VISH-ən) is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period 485.4 million years ago (Mya) to the start of the Silurian Period 443.8 Mya.The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in North Wales in the Cambrian and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian systems, and placed them in a system of their own. The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the earlier Cambrian Period, although the end of the period was marked by the Ordovician–Silurian extinction events. Invertebrates, namely molluscs and arthropods, dominated the oceans, with members of the latter group probably starting their establishment on land during this time, becoming fully established by the Devonian. The first land plants are known from this period. The Great Ordovician Biodiversification Event considerably increased the diversity of life. Fish, the world's first true vertebrates, continued to evolve, and those with jaws may have first appeared late in the period. About 100 times as many meteorites struck the Earth per year during the Ordovician compared with today.

ChatGPTRate this definition:0.0 / 0 votes

1. ordovician

   The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era, that spanned from roughly 485.4 million to 443.8 million years ago. During this period, the area north of the tropics was almost entirely ocean, and most of the world's land was collected into the southern supercontinent Gondwana. It was characterized by the development of marine invertebrate fauna, primitive fish, and first land plants. The Ordovician was named after the Celtic tribe of the Ordovices.

WikidataRate this definition:0.0 / 0 votes

1. Ordovician

   The Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 485.4 ± 1.9 to 443.4 ± 1.5 million years ago. It follows the Cambrian Period and is followed by the Silurian Period. The Ordovician, named after the Celtic tribe of the Ordovices, was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in northern Wales into the Cambrian and Silurian periods respectively. Lapworth, recognizing that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian periods, realized that they should be placed in a period of their own. While recognition of the distinct Ordovician Period was slow in the United Kingdom, other areas of the world accepted it quickly. It received international sanction in 1960, when it was adopted as an official period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the Cambrian, although the end of the period was marked by a significant mass extinction. Invertebrates, namely mollusks and arthropods, dominated the oceans. Fish, the world's first true vertebrates, continued to evolve, and those with jaws may have first appeared late in the period. Life had yet to diversify on land.

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1. • Period

How to pronounce ordovician?

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Numerology

1. Chaldean Numerology

   The numerical value of ordovician in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of ordovician in Pythagorean Numerology is: 2

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=ordovician
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Ordovician
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Ordovician
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=ordovician