Devonian
de·vo·nian
noun
1.
from 405 million to 345 million years ago; dominance of fishes and appearance of amphibians and ammonites
Origin
From Medieval Latin Devōnia (“Devon”) + -an. By surface analysis, Devon + -ian. Doublet of Dumnonian.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.