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Possible definitions for jab

Bab
Iranian religious leader, founder of the Babi religion and one of the central figures of Baha'i. The son of a merchant, he was influenced by the Shaykhi school of Shiite Islam. In 1844 he wrote a commentary on the sura of Joseph in the Quran and declared himself the Bab (Arabic: "gateway") to the hidden imam. Later he would claim to be the imam himself, and finally a divine manifestation. The same year he assembled 18 disciples, who spread the new faith in the various Persian provinces. He had popular support but was opposed by members of the religious class, and he was arrested near Tehran in 1847 and imprisoned. Meeting at Badasht in 1848, his followers, the Azali, formally broke with Islam. Mirza was executed by a firing squad at Tabriz in 1850.


Gabo
Russian-U.S. sculptor. He studied at the Univ. of Munich, and in 1913 he was introduced to avant-garde art in Paris by his brother, A. Pevsner. In 1920 the brothers returned to Russia and issued the Realist Manifesto, setting forth the principles of European Constructivism. Gabo produced abstract works of such unorthodox materials as glass, plastic, and wire to achieve a sense of movement. After some years in Europe, he settled in the U.S. in 1946 and taught at Harvard's architecture school. He received many awards and public commissions. A pioneer of the Constructivist movement, he was one of the earliest artists to experiment with kinetic sculpture.


jack
In practical mechanics, portable hand-operated device for raising heavy weights through short distances, exerting great pressures, or holding assembled work firmly in position. The ratio of the load to the amount of force applied to the handle can be made quite high by using a gear or screw to regulate the upward extension. A ratchet allows a heavy weight to be raised in short successive stages. Though limited by the requirements of portability and ease of manual operation, jacks may lift, or exert a force of, several tons. A familiar example is the automobile jack, used to raise one end of a car to change a tire.

Any of more than 150 species of fishes (family Carangidae, order Perciformes) found in temperate and tropical portions of the Atlantic, Pacific, and Indian oceans and occasionally in fresh or brackish water. Though body size and shape vary greatly, many species have small scales that create a smooth appearance, a laterally compressed body, rows of large spiky scales along the side near the tail fin, and a deeply forked tail. Many have a bluish green, silvery, or yellowish sheen. Jacks are important commercially and are favored sport fishes. See also amberjack.

In practical mechanics, portable hand-operated device for raising heavy weights through short distances, exerting great pressures, or holding assembled work firmly in position. The ratio of the load to the amount of force applied to the handle can be made quite high by using a gear or screw to regulate the upward ...

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