Cimarron

(simə rän′, -rōn′)

river flowing from NE N.Mex. eastward to the Arkansas River, near Tulsa, Okla.: c. 600 mi (966 km)

Origin: AmSp cimarrón, wild, unruly (< OSp cimarra, thicket): prob. orig. referring to the wild sheep (bighorn) found along its banks

See Cimarron in American Heritage Dictionary 4

A river rising in northeast New Mexico and flowing about 1,123 km (698 mi) eastward across southwest Kansas to the Arkansas River in northern Oklahoma.
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