devonian_period (HyperDic hyper-dictionary)

English > 1 sense of the expression *Devonian period*:
NOUN	time	Devonian period, Devonian, Age of Fishes	from 405 million to 345 million years ago

English > *Devonian period*: 1 sense > noun 1, time
Meaning	From 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites.
Synonyms	Devonian, Age of Fishes
Instance of	period, geological period	A unit of geological time during which a system of rocks formed
Part of	Paleozoic, Paleozoic era	From 544 million to about 230 million years ago
Spanish	devónico
Catalan	devonià

HyperDic: devonian_period