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Definition of Devonian period
1. Noun. From 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites.
Exact synonyms: Age Of Fishes, Devonian
Group relationships: Paleozoic, Paleozoic Era
Generic synonyms: Geological Period, Period
Group relationships: Paleozoic, Paleozoic Era
Generic synonyms: Geological Period, Period