Chinookan

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Chi·nook·an

 (shĭ-no͝ok′ən, chĭ-)
n.
A North American Indian language family of Washington and Oregon.

Chi·nook′an adj.
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Noun1.Chinookan - a Penutian language spoken by the Chinook
Penutian - a family of Amerindian language spoken in the great interior valley of California