(rare) Ellipsis of Acadian French.: the form of French spoken in Acadia. / (geology) The Middle Cambrian epoch, lasting from 497 million years ago to 509 million years ago.

Of or pertaining to Acadia, its people, or their language or culture. / (geology) Of or pertaining to the Acadian epoch.

A native of Acadia or their descendants who moved to Louisiana; a Cajun.

the quality or state of being Acadian.

plural of Acadian

A small chickadee subspecies with a brown crown from northern New England and the Maritime Provinces of Canada; Poecile hudsonicus littoralis.

plural of Acadian flycatcher

plural of Acadian chickadee

A dialect of French spoken in the Maritime Provinces of Canada and parts of Maine.

A very small North American owl, the northern saw-whet owl, Aegolius acadicus.