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(kīyo͞os`), Native North Americans who formerly occupied parts of NE Oregon and SE Washington. They were closely associated with the Nez PercéNez Percé
[Fr.,=pierced nose], Native North Americans whose language belongs to the Sahaptin-Chinook branch of the Penutian linguistic stock (see Native American languages).
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 and spoke a language belonging to the Sahaptin-Chinook branch of the Penutian linguistic stock (see Native American LanguagesNative American languages,
languages of the native peoples of the Western Hemisphere and their descendants. A number of the Native American languages that were spoken at the time of the European arrival in the New World in the late 15th cent.
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). A mission was established (1836) among them by Marcus WhitmanWhitman, Marcus,
1802–47, American pioneer and missionary in the Oregon country, b. Federal Hollow (later Rushville), N.Y. In 1836 he left a country medical practice to go West as a missionary for the joint Presbyterian-Congregationalist board.
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 at Waiilatpu. In 1847 the Cayuse, blaming the missionaries for an outbreak of smallpox, attacked the mission and killed the Whitmans and their helpers. The settlers then declared war and defeated the Cayuse. In 1855 they were placed on the Umatilla Reservation in Oregon, which they continue to share with the Wallawalla and Umatilla peoples; by 1990 they were among the smallest groups of Native Americans, numbering 126. A small horse bred by them gave the name cayuse to all Native American horses (see mustangmustang
[Sp. mesteño=a stray], small feral horse of the W United States. Mustangs are descended from escaped Native American horses, which in turn were descended from horses of North African blood, brought to the New World by the Spanish c.1500.
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See R. H. Ruby and J. A. Brown, The Cayuse Indians (1972).

References in periodicals archive ?
I wondered why it wasn't Cayuse, but learned thereafter that the Cayuse had disappeared as a separate tribe (and language) by 1900.
The most exciting event of the tour of the Cayuse Ranch was seeing and photographing the Spanish Mustangs that the Brislawn family raises on 3,000 acres of Wyoming grass.
You take that there Buffalo Basin stock," he went on earnestly, "and they're nothin' but inbred cayuse outlaws.
NOTAR was first developed by McDonnell Douglas during the 1980s and applied to a modified OH-6 Cayuse.
History: Before the Europeans, arrived, the Native American peoples inhabiting what is now the state of Washington included the Nez PercA, Spokane, Yakima, Cayuse, Okanogan, Walla Walla, and Colville in the interior, and the Nooksak, Chinook, Nisqually, Clallam, Makah, Quinault, and Puyallup in the coastal area.
A Boeing-Sikorsky team is developing the Comanche to replace the AH-1 Cobra, OH-58 Kiowa and OH-6 Cayuse helicopters fur armed reconnaissance and light attack missions.
21, 2000) (containing the outline for the Confederated Tribes of the Umatilla Indian Reservation's (Umatilla, Cayuse, and Walla Walla) petition (four claims) brought before the ICC), available at http://www.
Not necessarily fast, the primary issue was actuality security for the revolver while mounted or dismounting intentionally--or from an unexpectedly bucking Cayuse.
At this remote outpost, the doctor and his young wife, Narcissa, laugh the Bible and farming to the Cayuse Indians, while practicing medicine among them.
Memorial to missionaries Marcus and Narcissa Whitman and others, killed by Cayuse Indians in 1847.
Whitman Mission National Historic Site, near Walla Walla, is the site where Cayuse Indians killed the Methodist missionary Whitman and his pioneer group.