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The Collaborative International Dictionary
Acadian epoch

Acadian \A*ca"di*an\, a. Of or pertaining to Acadia, or Nova Scotia. ``Acadian farmers.''
--Longfellow. -- n. A native of Acadie.

Acadian epoch (Geol.), an epoch at the beginning of the American paleozoic time, and including the oldest American rocks known to be fossiliferous. See Geology.

Acadian owl (Zo["o]l.), a small North American owl ( Nyctule Acadica); the saw-whet. [1913 Webster] ||

Wiktionary
acadian epoch

n. (context geology English) The geologic time period from 497 million year ago to 509 million year ago.; Middle Cambrian.