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ball-and-socket joint
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 joint consists essentially of a spherical knob at the end of a shaft, with the knob fitting securely into a mating sock...
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joint
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 cartilage. Movable joints are found for the most part in the limbs. Hinge joints provide a forward and backward motion, as a...
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joint
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 commonly found in igneous rocks. Similar joints occur in thick beds of sandstone and gneiss, with the sheets resembling...
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sprain
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 wrist joints, causing pain, swelling, and difficulty in moving the involved joint. Treatment consists of application ...
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Joint Chiefs of Staff
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 Council, and the Secretary of Defense. Members include the chairman, appointed by the President with Senate approval; the ...
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spavin
spavin , 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 fluid; and bone spavin, the bony enlargement of the bones that constitute the hock joint. The latter is a form of arthritis and ca...
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Westminster
Westminster 1 Residential city (1990 pop. 78,118), Orange co., S Calif.; founded 1870 as a temperance colony for Presbyterians, inc. 1957. It has several industrial parks. Naval Weapons Station Seal Beach and Joint Forces Training Base Los Alamitos, with units of the California National Guard and...
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Oneida
Oneida , city (1990 pop. 10,850), Madison co., central N.Y.; inc. 1901. Silverware is its best-known product; factories also manufacture industrial wire and cable, and paper and plastic goods. Nearby was the Oneida Community, a religious society of Perfectionists that was established (1848) by Joh...
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carpentry
carpentry. 1. The trade of selecting, cutting, and joining timber for structural purposes. 2. Timber-work constructed by a carpenter: an assemblage of pieces of wood connected by means of joints, etc. It is distinct from joinery....
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leg
leg one of the paired limbs of an animal used for support of the body and for locomotion. Properly, the human leg is that portion of the extremity between the foot and the thigh. This section of the human leg contains two long bones, the tibia and the fibula. The upper end of the tibia joins with t...
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