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spavin

(Encyclopedia) spavinspavinspăvˈĭn [key], disease of horses affecting the hock joint. There are two types—bog spavin, in which the hock joint is distended as a result of the collection of synovial…

ball-and-socket joint

(Encyclopedia) ball-and-socket joint, in engineering, mechanical connection used between parts that must be allowed some relative angular motion in nearly all directions. As the name implies, the…

sprain

(Encyclopedia) sprain, stretching or wrenching of the ligaments and tendons of a joint, often with rupture of the tissues but without dislocation. Sprains occur most commonly at the ankle, knee, or…

Joint Chiefs of Staff

(Encyclopedia) Joint Chiefs of Staff, U.S. statutory agency, created in 1949 within the Dept. of Defense. The chairman is the principal military adviser to the President, the National Security…

Joint Base Andrews

(Encyclopedia) Joint Base Andrews, officially Joint Base Andrews Naval Air Facility Washington, formerly Andrews Air Force Base, U.S. military installation, 4,279 acres (1,732 hectares), central Md…

Joint Base McGuire-Dix-Lakehurst

(Encyclopedia) Joint Base McGuire-Dix-Lakehurst, U.S. military base, central N.J., SE of Trenton; est. 1917 as Camp Dix and named for U.S. statesman John A. Dix. In 1939 it was made a permanent…

joint, in anatomy

(Encyclopedia) joint, in anatomy, juncture between two bones. Some joints are immovable, e.g., those that connect the bones of the skull, which are separated merely by short, tough fibers of…

joint, in geology

(Encyclopedia) joint, in geology, fracture in rocks along which no appreciable movement has occurred (see fault). Nearly vertical, or sheet, joints that result from shrinkage during cooling are…