Etymology
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Iowa

organized as a U.S. territory 1838; admitted as a state 1846, named for the river, ultimately from the name of the native people, of the Chiwere branch of the Siouan family; said to be from Dakota ayuxba "sleepy ones," or from an Algonquian language (Bright cites Miami/Illinois /aayohoowia/). On a French map of 1673 it appears as Ouaouiatonon. John Quincy Adams, in his diary entries on the House of Representatives debate on the territorial bill in 1838, writes it Ioway. Related: Iowan.

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Definitions of Iowa

Iowa (n.)
a member of the Siouan people formerly living in Iowa and Minnesota and Missouri;
Synonyms: Ioway
Iowa (n.)
a state in midwestern United States;
Synonyms: Hawkeye State / ia / Ia.
Iowa (n.)
a dialect of the Chiwere language spoken by the Iowa;
Synonyms: Ioway
From wordnet.princeton.edu