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WordReference Random House Unabridged Dictionary of American English © 2024De•vo•ni•an (də vō′nē ən),USA pronunciation adj. - Geologynoting 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. See table under geologic time.
- of or pertaining to Devonshire, England.
n. - Geologythe Devonian Period or System.
- Medieval Latin Devoni(a) Devon + -an
- 1605–15
Collins Concise English Dictionary © HarperCollins Publishers:: Devonian /dəˈvəʊnɪən/ adj - 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
n - the Devonian ⇒ the Devonian period or rock system
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