Kirksville, city (1990 pop. 17,152), seat of Adair co., N Mo.; inc. 1857. A processing, trade, and shipping center for a farm area (corn, soybeans, sheep, cattle, hogs), Kirksville also has light manufacturing. Andrew Taylor Still founded the first school of osteopathy there in 1892; it is now the Kirksville College of Osteopathic Medicine. Northeast Missouri State Univ. is also in the city, and Thousand Hills State Park is nearby.