Definitions for Devonian
dəˈvoʊ ni ənde·vo·ni·an

Princeton's WordNetRate this definition:4.0 / 1 vote

1. Devonian, Devonian period, Age of Fishesnoun

   from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites

WiktionaryRate this definition:0.0 / 0 votes

1. Devoniannoun

   A native or inhabitant of the English region of Devon.

2. Devonianadjective

   of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 415 to 360 million years ago

3. Devonianadjective

   Of or pertaining to the English region of Devon.

4. Devoniannoun

   the Devonian period

WikipediaRate this definition:0.0 / 0 votes

1. Devonian

   The Devonian ( də-VOH-nee-ən, de-) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, 419.2 million years ago (Mya), to the beginning of the Carboniferous, 358.9 Mya. It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominating almost every known aquatic environment. The ancestors of all four-limbed vertebrates (tetrapods) began adapting to walk on land, as their strong pectoral and pelvic fins gradually evolved into legs, though they were not fully established until the Late Carboniferous. In the oceans, primitive sharks became more numerous than in the Silurian and Late Ordovician. The first ammonites, a subclass of molluscs, appeared. Trilobites, the mollusc-like brachiopods, and the great coral reefs were still common. The Late Devonian extinction which started about 375 million years ago severely affected marine life, killing off all placodermi, and all trilobites, save for a few species of the order Proetida. Devonian palaeogeography was dominated by the supercontinent of Gondwana to the south, the small continent of Siberia to the north, and the medium-sized continent of Laurussia to the east. Major tectonic events include the closure of the Rheic Ocean, the separation of South China from Gondwana, and the resulting expansion of the Paleo-Tethys Ocean. The Devonian experienced several major mountain-building events as Laurussia and Gondwana approached; these include the Acadian Orogeny in North America and the beginning of the Variscan Orogeny in Europe. These early collisions preceded the formation of Pangaea in the Late Paleozoic.

ChatGPTRate this definition:0.0 / 0 votes

1. devonian

   The Devonian is a geologic period and system of the Paleozoic era spanning from about 419.2 to 358.9 million years ago. It is named after Devon, England where rocks from this period were first studied. During the Devonian period, significant biological events occurred such as the first appearance of trees and forests, as well as the evolution of vertebrates like the first amphibians and ancestors of present-day fish. The climate during this period was warm, and the earth's landscape was predominantly covered with shallow seas and tall trees.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Devonianadjective

   of or pertaining to Devon or Devonshire in England; as, the Devonian rocks, period, or system

2. Devoniannoun

   the Devonian age or formation

WikidataRate this definition:0.0 / 0 votes

1. Devonian

   The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 419.2 ± 3.2 Mya, to the beginning of the Carboniferous Period, about 358.9 ± 0.4. It is named after Devon, England, where rocks from this period were first studied. The Devonian period experienced the first significant adaptive radiation of terrestrial life. Since large vertebrate terrestrial herbivores had not yet appeared, free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. Various terrestrial arthropods also became well-established. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the "Age of Fish". The first ray-finned and lobe-finned bony fish appeared, while the placoderms began dominating almost every known aquatic environment. The ancestors of all tetrapods began adapting to walking on land, their strong pectoral and pelvic fins gradually evolved into legs. In the oceans, primitive sharks became more numerous than in the Silurian and the late Ordovician. The first ammonite mollusks appeared. Trilobites, the mollusk-like brachiopods and the great coral reefs, were still common. The Late Devonian extinction severely affected marine life, killing off all placoderms, and all trilobites, save for a few species of the order Proetida.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Devonian

   de-vō′ni-an, adj. belonging to Devonshire: belonging to a system of geological strata which abound in Devonshire, closely corresponding to Old Red Sandstone.

Matched Categories

1. • Period

How to pronounce Devonian?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say Devonian in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Devonian in Chaldean Numerology is: 7

2. Pythagorean Numerology

   The numerical value of Devonian in Pythagorean Numerology is: 3

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Devonian
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Devonian
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Devonian
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/Devonian
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Devonian
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=Devonian