Devonian

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De·vo·ni·an

 (dĭ-vō′nē-ən)
adj.
Of, relating to, or being the period of geologic time from about 416 to 359 million years ago, the fourth period of the Paleozoic Era. The Devonian Period is 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.

[After Devon, a county of southwest England.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Devonian

(dəˈvəʊnɪən)
adj
1. (Geological Science) 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
2. (Placename) of or relating to Devon
n
(Geological Science) the Devonian the Devonian period or rock system
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

De•vo•ni•an

(dəˈvoʊ ni ən)

adj.
1. noting or pertaining to a period of the Paleozoic Era, 405 million 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.
n.
3. the Devonian Period or System.
[1605–15; < Medieval Latin Devoni(a) Devon + -an1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

De·vo·ni·an

(dĭ-vō′nē-ən)
The fourth period of the Paleozoic Era, from about 408 to 360 million years ago, characterized by the appearance of forests, amphibians, and insects. See Chart at geologic time.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Devonian - from 405 million to 345 million years agoDevonian - from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites
Paleozoic, Paleozoic era - from 544 million to about 230 million years ago
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
devon

Devonian

[deˈvəʊnɪən] ADJ (Geol) → devónico
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
References in periodicals archive ?
Yw/R represents yield per recruit, tc indicate mean age of fish at first capture, tr stands for recruitment age, tI>> was the asymptotic age, Q represents constant value and its value equals to 1, -3, 3 and -1 when n is 0, 1, 2 and 3 correspondingly (Pitcher and Hart, 1982).
Annuli were assumed to form early in the calendar year, so the age of fish spawning in the fall was based on die number of observed annuli with a "+" added to indicate that the fish had experienced a complete growing season after the last annulus was deposited (e.g., a fish spawning in the fall of its third year of life would be considered age 2+).
It is generally accepted that natural mortality is very high during the larval stages and decreases as the age of fish approaching a steady rate (Jennings et al., 2001).
The ability to find the age of fish accurately is essential in understanding the dynamics of fish population.
Results indicated that the mean age of fish introduction was 8.3 months, and that at 1 year, 80% of the children consumed fish regularly (defined as [greater than or equal to] 2 times/month) and the mean consumption was once a week.
The work of Michael Lieb (who himself has edited a volume of essays called Milton in the Age of Fish: Authorship, Text and Terrorism) has long examined Milton's attitude toward divinely sanctioned violence, and Visionary Milton: Essays on Prophecy and Violence is a collection of essays, afestschrift, if you will, that builds upon that work, while taking advantage of the now-trendy debate about Milton and terrorism.
The most widely validated method for determining age of fish is osseochronometry, the estimation of age using hardparts (Casselman, 1987).
The use of scale size, shapes and number can be traced back to the first half of the 19th century when Agassiz [1] used it in fish taxonomy for the first time [40,9] and even some fishery biologists also used scale in determining the age of fish [23].
(1997), using otoliths, found least cisco in Dease Inlet as old as 24 years, much older than the maximum age of fish observed in the Chatanika River in 2008.
The proportional incremental values decreased with increasing age of fish.