Geology. noting or pertaining to a period of the Paleozoic Era, 405 to 345 million years ago, characterized by the dominance of fishes and the advent of amphibians and ammonites.
of or relating to Devonshire, England.
Geology. the Devonian Period or System.
- post-De·vo·ni·an, adjective
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How to use Devonian in a sentence
From Lincoln Pioneer Village and Devonian-era fossil beds to the spires of ancient stalactites at Marengo Cave, dinosaur lovers and water enthusiasts alike will find no shortage of attractions along this route.
The whole region is underlain by nearly horizontal and undisturbed rocks of the Palaeozoic from the Devonian downward.
The volcanic outbursts which followed became feebler in the Devonian and Carboniferous periods and ceased with the Permian.
In the succeeding Devonian System these are followed by the dipneusta, transitional forms between the fishes and the amphibia.The Wonders of Life | Ernst Haeckel
The Devonian and Cornishman will be found by the visitor to be courteous and hospitable.A Book of the West. Volume I Devon | S. Baring-Gould
Can any of your Devonian readers give additional particulars of his office or his duties?
British Dictionary definitions for Devonian
of, denoting, or formed in the fourth period of the Palaeozoic era, between the Silurian and Carboniferous periods, lasting 60-70 million years during which amphibians first appeared
of or relating to Devon
the Devonian the Devonian period or rock system
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for Devonian
The fourth period of the Paleozoic Era, from about 408 to 360 million years ago. During this time there were three major landmasses: most of modern day North America and Europe were located along the equator; a portion of Siberia was located to the north; and a continent consisting of South America, Australia, Africa, India, and Antarctica was located in the Southern Hemisphere. In the early Devonian small plants dominated the landscape, but by the end of the Devonian ferns and seed plants had appeared, as had the first forests. The first tetrapods (terrestrial vertebrates) and terrestrial arthropods appeared, as did many new types of fish. See Chart at geologic time.
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