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Devonian

 - 3 dictionary results
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De⋅vo⋅ni⋅an

  [duh-voh-nee-uhn]
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–adjective
1. 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.
2. of or pertaining to Devonshire, England.
–noun
3. Geology. the Devonian Period or System.
Origin:
1605–15; < ML Devoni(a) Devon + -an
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Order Natural Bluestone
Wholesale quarriers & fabricators of the finest bluestone available.
www.johnstonandrhodes.com
De·vo·ni·an   (dĭ-vō'nē-ən)   
adj.  Of or belonging to the geologic time, system of rocks, or sedimentary deposits of the fourth period of the Paleozoic Era, characterized by the development of lobe-finned fishes, the appearance of amphibians and insects, and the first forests. See Table at geologic time.
n.  The Devonian Period or its system of deposits.

[After Devon, a county of southwest England.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

Devonian 
1837, as a geological era, from the English county of Devon, where the Old Red Sandstone formations of that age are prominent. The county name is O.E. Defena(scir), late 9c., "(territory of the) Dumnonii," a Celtic name.
Online Etymology Dictionary, © 2001 Douglas Harper
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